/* ==========================================================================
   Nurul Arefin Nabil — Portfolio, ICT Syllabus & Projects Portal Stylesheet
   Ultra-Refined Dual Theme + Particle Canvas + Custom Glowing Cursor Follower
   100% Mobile & Desktop Responsive Architecture (Zero Overflow Guarantee)
   ========================================================================== */

:root {
    /* Color Palette - Dark Default */
    --bg-dark: #080b12;
    --bg-card: rgba(15, 23, 42, 0.88);
    --bg-card-hover: rgba(24, 34, 58, 0.96);
    --bg-modal: rgba(12, 17, 28, 0.96);
    --border-color: rgba(255, 255, 255, 0.12);
    --border-glow: rgba(99, 102, 241, 0.4);
    
    /* Brand Accent Colors */
    --primary: #6366f1;       /* Indigo Glow */
    --primary-hover: #4f46e5;
    --secondary: #06b6d4;     /* Cyan Neon */
    --accent: #10b981;        /* Emerald Accent */
    --amber: #f59e0b;         /* Warm Gold */
    --pink: #ec4899;
    
    /* Text Colors — Enhanced Clarity & High Contrast */
    --text-main: #ffffff;
    --text-muted: #cbd5e1;
    --text-sub: #94a3b8;
    
    /* Gradients */
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    --grad-accent: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
    --grad-warm: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
    --grad-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    --form-bg: rgba(0, 0, 0, 0.3);

    /* Fonts */
    --font-heading: 'Outfit', 'Hind Siliguri', sans-serif;
    --font-body: 'Inter', 'Hind Siliguri', sans-serif;

    /* Spacing & Shadows */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);
    --shadow-card: 0 12px 35px -10px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --trans-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --trans-normal: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --trans-spring: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light / Day Theme Overrides — High Contrast & Clear Text Guarantee */
/* Light / Day Theme Overrides — High Contrast & Premium Parity Guarantee */
[data-theme="light"] {
    --bg-dark: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.78);
    --bg-card-hover: rgba(255, 255, 255, 0.92);
    --bg-modal: rgba(255, 255, 255, 0.95);
    --border-color: rgba(99, 102, 241, 0.2);
    --border-glow: rgba(99, 102, 241, 0.35);
    
    --text-main: #0f172a;
    --text-muted: #334155;
    --text-sub: #475569;
    
    --grad-card: linear-gradient(135deg, rgba(255, 255, 255, 0.85) 0%, rgba(241, 245, 249, 0.6) 100%);
    --shadow-card: 0 10px 30px -5px rgba(99, 102, 241, 0.08), 0 4px 12px rgba(0, 0, 0, 0.03);
    --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.15);
    --form-bg: rgba(255, 255, 255, 0.85);
}

[data-theme="light"] .glass-card {
    background: rgba(255, 255, 255, 0.78) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border: 1px solid rgba(99, 102, 241, 0.2) !important;
    box-shadow: 0 10px 30px -5px rgba(99, 102, 241, 0.08), 0 4px 12px rgba(0, 0, 0, 0.03) !important;
}

[data-theme="light"] .glass-card:hover {
    background: rgba(255, 255, 255, 0.92) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 16px 35px -8px rgba(99, 102, 241, 0.2), 0 0 20px rgba(99, 102, 241, 0.12) !important;
}

/* Light / Day Theme Footer Overrides */
[data-theme="light"] .footer {
    background: #ffffff !important;
    border-top: 1px solid #e2e8f0 !important;
    color: #0f172a !important;
}

[data-theme="light"] .footer h3,
[data-theme="light"] .footer h4 {
    color: #0f172a !important;
}

[data-theme="light"] .footer p,
[data-theme="light"] .footer li,
[data-theme="light"] .footer a {
    color: #334155 !important;
}

[data-theme="light"] .footer a:hover {
    color: var(--primary) !important;
}

/* Explicit Top Accent Border Preservations for Education Timeline Cards */
.timeline-item:nth-child(1) .glass-card,
.timeline-card:nth-child(1) {
    border-top: 4px solid var(--primary) !important;
}

.timeline-item:nth-child(2) .glass-card,
.timeline-card:nth-child(2) {
    border-top: 4px solid var(--secondary) !important;
}

.timeline-item:nth-child(3) .glass-card,
.timeline-card:nth-child(3) {
    border-top: 4px solid var(--accent) !important;
}

/* Translucent Glowing Glass Form Controls for Light Mode */
[data-theme="light"] .form-control, 
[data-theme="light"] .form-select {
    background: rgba(255, 255, 255, 0.72) !important;
    border: 1.5px solid rgba(99, 102, 241, 0.32) !important;
    color: #0f172a !important;
    backdrop-filter: blur(12px) !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.08) !important;
}

[data-theme="light"] .form-control:focus, 
[data-theme="light"] .form-select:focus {
    background: rgba(255, 255, 255, 0.95) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 18px rgba(99, 102, 241, 0.3), 0 0 0 3px rgba(99, 102, 241, 0.15) !important;
}

[data-theme="light"] .custom-checkbox {
    background: rgba(255, 255, 255, 0.65) !important;
    border-color: rgba(99, 102, 241, 0.32) !important;
    color: #0f172a !important;
}

[data-theme="light"] .section-tag {
    background: rgba(99, 102, 241, 0.12) !important;
    border: 1.5px solid rgba(99, 102, 241, 0.35) !important;
    color: #4f46e5 !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.12) !important;
}

[data-theme="light"] .hero-avatar-img {
    background: #f1f5f9;
}

/* Special Featured Cards High Contrast Opaque Fix */
.special-card {
    border-color: #ec4899 !important;
}

[data-theme="dark"] .special-card {
    background: #0f1523 !important;
    border: 2px solid #ec4899 !important;
    box-shadow: 0 22px 55px -8px rgba(236, 72, 153, 0.4), 0 0 30px rgba(236, 72, 153, 0.25) !important;
}

[data-theme="light"] .special-card {
    background: #ffffff !important;
    border: 2px solid #ec4899 !important;
    box-shadow: 0 20px 45px -8px rgba(236, 72, 153, 0.3), 0 4px 16px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .subject-title,
[data-theme="light"] .subject-desc,
[data-theme="light"] .subject-level,
[data-theme="light"] .why-title,
[data-theme="light"] .why-desc,
[data-theme="light"] .chapter-title,
[data-theme="light"] .topic-item,
[data-theme="light"] .edu-title,
[data-theme="light"] .edu-desc {
    color: #0f172a !important;
}

[data-theme="light"] .topic-item {
    color: #1e293b !important;
}

/* Reset & Base Setup */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    overflow-x: clip;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

/* Ensure Bengali & Long Texts Wrap Gracefully */
h1, h2, h3, h4, h5, h6, p, span, a, strong, div, label {
    overflow-wrap: break-word;
    word-wrap: break-word;
    max-width: 100%;
}

/* Fixed Top Glowing Scroll Progress Indicator Bar */
.scroll-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    width: 0%;
    background: linear-gradient(90deg, #6366f1 0%, #06b6d4 33%, #10b981 66%, #ec4899 100%);
    z-index: 10001;
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.8), 0 0 24px rgba(236, 72, 153, 0.7);
    transition: width 0.08s ease-out;
}

/* Particle Canvas Background */
#bgCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

/* Custom Interactive Mouse Cursor Glow & Follower */
.custom-cursor {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 12px var(--primary);
    transition: transform 0.1s ease;
}

.custom-cursor-follower {
    width: 38px;
    height: 38px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: transform 0.18s cubic-bezier(0.25, 1, 0.5, 1), background-color 0.3s ease, border-color 0.3s ease;
    opacity: 0.65;
}

@media (max-width: 768px) {
    .custom-cursor, .custom-cursor-follower {
        display: none !important;
    }
}

/* Ambient Glowing Orbs Background */
.ambient-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.4;
    transition: opacity 0.4s ease;
}

[data-theme="light"] .ambient-glow {
    opacity: 0.2;
}

.glow-1 {
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, #6366f1 0%, rgba(99,102,241,0) 70%);
    top: -120px;
    left: -120px;
    animation: floatGlow 12s ease-in-out infinite alternate;
}

.glow-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, #06b6d4 0%, rgba(6,182,212,0) 70%);
    top: 45%;
    right: -120px;
    animation: floatGlow 14s ease-in-out infinite alternate-reverse;
}

.glow-3 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, #10b981 0%, rgba(16,185,129,0) 70%);
    bottom: 50px;
    left: 20%;
    animation: floatGlow 10s ease-in-out infinite alternate;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -40px) scale(1.1); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.25;
}

.text-gradient {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-accent-gradient {
    background: var(--grad-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-warm-gradient {
    background: var(--grad-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Containers & Sections */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.section {
    padding: 5.5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3.5rem auto;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1.1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-full);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 0.85rem;
    letter-spacing: -0.5px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Buttons System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.65rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--trans-spring);
    white-space: nowrap;
    min-height: 44px;
    position: relative;
    overflow: hidden;
    max-width: 100%;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--grad-primary);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 28px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-3px) scale(1.02);
}

.btn-accent {
    background: var(--grad-accent);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
}

.btn-accent:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 28px rgba(16, 185, 129, 0.5);
}

.btn-lg {
    padding: 1.1rem 2.25rem;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

/* Glassmorphic Card Base */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: var(--trans-spring);
    position: relative;
    overflow: hidden;
    width: 100%;
    transform: translateZ(0);
    -webkit-font-smoothing: antialiased;
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary) !important;
    transform: translateY(-8px) scale(1.015);
    box-shadow: 0 20px 45px rgba(99, 102, 241, 0.25), 0 0 25px rgba(99, 102, 241, 0.15) !important;
}

/* ==========================================================================
   Header & Navbar Navigation (Brand Name Line-Break Fix Guarantee)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--trans-normal);
}

.navbar.scrolled {
    padding: 0.75rem 0;
    background: rgba(8, 11, 18, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid #e2e8f0;
}

.nav-container {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: nowrap !important;
    width: 100%;
}

.nav-actions {
    display: flex !important;
    align-items: center !important;
    gap: 0.75rem !important;
    flex-wrap: nowrap !important;
    flex-shrink: 0 !important;
}

.mobile-toggle {
    display: none;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--text-main);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: var(--trans-fast);
    flex-shrink: 0;
}

@media (max-width: 991px) {
    .mobile-toggle {
        display: flex !important;
    }
}

/* Universal Top Header & Hero Clearance Fix (prevents fixed navbar overlap on ALL pages) */
.hero,
.page-banner {
    margin-top: 85px !important;
    padding-top: 3.5rem !important;
    padding-bottom: 3.5rem !important;
}

@media (max-width: 991px) {
    .hero,
    .page-banner {
        margin-top: 80px !important;
        padding-top: 3.25rem !important;
        padding-bottom: 2.75rem !important;
    }
}

@media (max-width: 576px) {
    .hero,
    .page-banner {
        margin-top: 75px !important;
        padding-top: 3rem !important;
        padding-bottom: 2.25rem !important;
    }
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    text-decoration: none;
    flex-shrink: 0;
}

.brand-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-glow);
    transition: var(--trans-spring);
    flex-shrink: 0;
}

.brand-logo:hover .brand-avatar {
    transform: scale(1.08) rotate(4deg);
}

.brand-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* User Explicit Requirement: Arefin Nabil MUST be strictly on 1 SINGLE line everywhere */
.brand-name {
    font-size: 1.18rem;
    font-weight: 800;
    line-height: 1.15;
    white-space: nowrap !important;
    word-break: keep-all !important;
    letter-spacing: -0.2px;
    color: var(--text-main);
}

.brand-subtitle {
    font-size: 0.725rem;
    color: var(--secondary);
    font-weight: 600;
    letter-spacing: 0.4px;
    white-space: nowrap !important;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    list-style: none;
}

.nav-link {
    font-size: 0.925rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--trans-fast);
    position: relative;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--grad-primary);
    transition: var(--trans-fast);
    border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-shrink: 0;
}

.theme-toggle-btn, .lang-toggle-btn {
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--trans-spring);
    padding: 0 0.85rem;
    font-weight: 700;
    font-size: 0.85rem;
    gap: 0.4rem;
    flex-shrink: 0;
}

.theme-toggle-btn {
    width: 40px;
    border-radius: 50%;
    padding: 0;
}

.theme-toggle-btn:hover, .lang-toggle-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

.mobile-toggle {
    display: none;
    font-size: 1.4rem;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 0.4rem;
}

/* Ensure mobile menu elements are strictly hidden on desktop */
@media (min-width: 769px) {
    .mobile-menu-whatsapp, .mobile-nav-settings {
        display: none !important;
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 7.5rem;
    padding-bottom: 4rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3.5rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1.1rem;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: var(--radius-full);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    max-width: 100%;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 12px var(--accent);
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 1; }
    50% { transform: scale(1.25); opacity: 0.5; }
    100% { transform: scale(0.95); opacity: 1; }
}

.hero-title {
    font-size: 3.4rem;
    letter-spacing: -1px;
    margin-bottom: 1.2rem;
    line-height: 1.15;
    width: 100%;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 620px;
    width: 100%;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    width: 100%;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    width: 100%;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 800;
}

.stat-label {
    font-size: 0.825rem;
    color: var(--text-sub);
    font-weight: 500;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    width: 100%;
}

.avatar-frame {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    background: var(--grad-primary);
    padding: 6px;
    animation: morph 8s ease-in-out infinite alternate;
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 45% 55% 45%; }
    100% { border-radius: 70% 30% 30% 70% / 60% 40% 60% 40%; }
}

.hero-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
    background: var(--bg-dark);
}

.floating-badge {
    position: absolute;
    padding: 0.75rem 1.1rem;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 10;
    animation: float 4s ease-in-out infinite alternate;
}

.badge-top {
    top: 10px;
    left: -20px;
}

.badge-bottom {
    bottom: 20px;
    right: -20px;
    animation-delay: -2s;
}

@keyframes float {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-14px); }
}

.badge-icon {
    font-size: 1.4rem;
}

.badge-text-title {
    font-size: 0.85rem;
    font-weight: 700;
}

.badge-text-sub {
    font-size: 0.725rem;
    color: var(--text-muted);
}

/* ==========================================================================
   "Why Choose Me?" Section Grid Optimization
   ========================================================================== */
.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

/* ==========================================================================
   Mobile-Only Sticky Card Stacking Effect Utility & Desktop Grid Setup
   ========================================================================== */
@media (max-width: 991px) {
    .why-us-stack.stack-cards-wrapper {
        display: flex;
        flex-direction: column;
        gap: 1.75rem;
        position: relative;
        max-width: 100%;
        margin: 0 auto 3.5rem auto;
    }

    .why-us-stack .stacked-card {
        position: sticky;
        top: calc(85px + var(--card-index, 0) * 36px);
        background: #0f1523 !important;
        backdrop-filter: blur(24px) !important;
        -webkit-backdrop-filter: blur(24px) !important;
        border: 1px solid rgba(255, 255, 255, 0.12) !important;
        border-radius: var(--radius-lg);
        transition: transform 0.35s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.35s ease;
        box-shadow: 0 22px 50px -10px rgba(0, 0, 0, 0.75), 0 0 25px rgba(99, 102, 241, 0.18);
        will-change: position, top;
        margin-bottom: 2.75rem;
        padding: 2.25rem 2rem !important;
    }

    [data-theme="light"] .why-us-stack .stacked-card {
        background: #ffffff !important;
        border-color: rgba(99, 102, 241, 0.25) !important;
        box-shadow: 0 18px 45px -10px rgba(99, 102, 241, 0.18), 0 4px 16px rgba(0, 0, 0, 0.05);
    }
}

@media (min-width: 992px) {
    .why-us-stack {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        gap: 1.75rem;
        margin-bottom: 3.5rem;
    }
    .why-us-stack .why-card {
        grid-column: span 2;
    }
    .why-us-stack .why-card:nth-child(4) {
        grid-column: span 3;
    }
    .why-us-stack .why-card:nth-child(5) {
        grid-column: span 3;
    }
}

.stack-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 1.25rem;
}

.stack-step-badge {
    font-size: 0.725rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    padding: 0.35rem 0.85rem;
    border-radius: 99px;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   Tuition Subjects & Services Grid Layout System (Optimized for PC & Mobile)
   ========================================================================== */
.subject-grid-academic {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    align-items: stretch;
    width: 100%;
}

.subject-grid-skills {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
    align-items: stretch;
    width: 100%;
}

@media (min-width: 768px) {
    .subject-grid-academic {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 1.5rem !important;
    }

    .subject-grid-skills {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1.5rem !important;
    }
}

@media (max-width: 767px) {
    .subject-grid-academic,
    .subject-grid-skills {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }
}

/* ==========================================================================
   Alternating Left/Right/Up Scroll Reveal Animations (Crisp Font Vector Fix)
   ========================================================================== */
.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.revealed,
.reveal-right.revealed,
.reveal-up.revealed {
    opacity: 1;
    transform: translate(0, 0);
}

/* Safe grid container reveal — opacity ONLY, NO transform (transform breaks grid layout) */
.reveal-grid {
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-grid.revealed {
    opacity: 1;
}

/* Staggered Scale-Pop Reveal for Teaching Modes */
.reveal-pop-up {
    opacity: 0;
    transform: translateY(40px) scale(0.92);
    transition: opacity 0.9s cubic-bezier(0.34, 1.56, 0.64, 1), transform 0.9s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: opacity, transform;
}

.reveal-pop-up.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 3D Fade-Zoom Reveal for Student & Parent Testimonials */
.reveal-fade-zoom {
    opacity: 0;
    transform: scale(0.88) translateY(30px);
    filter: blur(4px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1), filter 1s ease;
    will-change: opacity, transform, filter;
}

.reveal-fade-zoom.revealed {
    opacity: 1;
    transform: scale(1) translateY(0);
    filter: blur(0);
}

/* Glowing Border Entrance for Application Hub & Contact Forms */
.reveal-glow-border {
    opacity: 0;
    transform: translateY(35px) scale(0.97);
    box-shadow: 0 0 0 rgba(99, 102, 241, 0);
    transition: opacity 1s ease, transform 1s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 1.2s ease, border-color 1.2s ease;
    will-change: opacity, transform, box-shadow;
}

.reveal-glow-border.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
    border-color: rgba(99, 102, 241, 0.5) !important;
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.22) !important;
}

/* Mobile Touch-Active Glow Feedback */
@media (max-width: 768px) {
    .glass-card:active,
    .btn:active {
        transform: scale(0.985) !important;
        border-color: var(--secondary) !important;
        box-shadow: 0 0 18px rgba(6, 182, 212, 0.28) !important;
    }
}

/* Staggered Delay for grid items loaded with reveal classes */
.subject-grid-academic > *:nth-child(1) { transition-delay: 0.05s; }
.subject-grid-academic > *:nth-child(2) { transition-delay: 0.18s; }
.subject-grid-academic > *:nth-child(3) { transition-delay: 0.32s; }

.subject-grid-skills > *:nth-child(1) { transition-delay: 0.05s; }
.subject-grid-skills > *:nth-child(2) { transition-delay: 0.18s; }

.projects-grid > *:nth-child(1) { transition-delay: 0.05s; }
.projects-grid > *:nth-child(2) { transition-delay: 0.15s; }
.projects-grid > *:nth-child(3) { transition-delay: 0.25s; }
.projects-grid > *:nth-child(4) { transition-delay: 0.35s; }
.projects-grid > *:nth-child(5) { transition-delay: 0.45s; }
.projects-grid > *:nth-child(6) { transition-delay: 0.55s; }

.upcoming-projects-grid > *:nth-child(1) { transition-delay: 0.05s; }
.upcoming-projects-grid > *:nth-child(2) { transition-delay: 0.20s; }

.stack-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 1.25rem;
}

.stack-step-badge {
    font-size: 0.725rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    padding: 0.35rem 0.85rem;
    border-radius: 99px;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

@media (min-width: 992px) {
    .why-us-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .why-card {
        grid-column: span 2;
    }
    .why-card:nth-child(4) {
        grid-column: span 3;
    }
    .why-card:nth-child(5) {
        grid-column: span 3;
    }
}

.why-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    border-top: 4px solid var(--primary);
    height: 100%;
}

.why-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
}

.why-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-main);
}

.why-desc {
    font-size: 0.98rem;
    font-weight: 450;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Academic Qualifications Cards Grid */
.edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
}

.edu-card {
    padding: 2.25rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    border-top: 4px solid var(--secondary);
}

.edu-badge {
    display: inline-block;
    padding: 0.3rem 0.85rem;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent);
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 0.85rem;
}

.edu-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-main);
}

.edu-score {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.edu-desc {
    font-size: 0.98rem;
    font-weight: 450;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Page Banner & Responsive Grid Layouts */
.page-banner {
    padding-top: 7.5rem;
    padding-bottom: 2.5rem;
}

.page-title {
    font-size: 2.75rem;
    line-height: 1.25;
}

.live-app-grid {
    display: grid;
    grid-template-columns: 0.35fr 1.65fr;
    gap: 2rem;
    align-items: center;
}

.upcoming-projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
}

/* ICT Syllabus Chapter Cards */
.chapter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.75rem;
}

.chapter-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.chapter-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(6, 182, 212, 0.12);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--secondary);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 0.85rem;
}

.chapter-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.topic-list {
    list-style: none;
    margin-top: 0.75rem;
}

.topic-item {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    line-height: 1.45;
}

.topic-item i {
    color: var(--accent);
    font-size: 0.85rem;
    margin-top: 4px;
    flex-shrink: 0;
}

.chapter-footer {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.825rem;
    color: var(--text-sub);
}

/* ==========================================================================
   Refined 5 Subject Cards Symmetrical Grid Layout (3 + 2 Desktop Layout)
   ========================================================================== */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
    margin-bottom: 3.5rem;
}

.subject-grid-academic {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
}

.subject-grid-skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
}

@media (min-width: 992px) {
    .subject-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .subject-card {
        grid-column: span 2;
    }
    .subject-card:nth-child(4) {
        grid-column: span 3;
    }
    .subject-card:nth-child(5) {
        grid-column: span 3;
    }
    .subject-grid-academic {
        grid-template-columns: repeat(3, 1fr);
    }
    .subject-grid-skills {
        grid-template-columns: repeat(2, 1fr);
    }
}

.subject-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    height: 100%;
}

.subject-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.subject-tag-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.65rem;
}

.subject-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.45rem;
    color: var(--text-main);
}

.subject-level {
    font-size: 0.88rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 0.65rem;
}

.subject-desc {
    font-size: 0.98rem;
    font-weight: 450;
    color: var(--text-muted);
    line-height: 1.7;
}

/* About & Experience Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.about-bio-card {
    padding: 2.25rem;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.skill-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--trans-fast);
}

.skill-chip:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary);
    transform: translateY(-3px) scale(1.03);
}

/* Form Controls & Inputs */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.form-control, .form-select {
    width: 100%;
    padding: 0.8rem 1.1rem;
    background: var(--form-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--trans-fast);
    outline: none;
    min-height: 46px;
}

.form-select option {
    background: #0f172a;
    color: #ffffff;
    padding: 0.5rem;
}

[data-theme="light"] .form-select option {
    background: #ffffff;
    color: #0f172a;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.25);
}

.project-filters {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--trans-spring);
    min-height: 38px;
}

.filter-btn:hover, .filter-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.project-top {
    margin-bottom: 1.25rem;
}

.project-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
}

.project-folder-icon {
    font-size: 1.6rem;
    color: var(--primary);
}

.project-links {
    display: flex;
    gap: 0.75rem;
}

.project-link-icon {
    font-size: 1.1rem;
    color: var(--text-muted);
    transition: var(--trans-fast);
    padding: 0.2rem;
}

.project-link-icon:hover {
    color: var(--primary);
    transform: translateY(-2px);
}

.project-name {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.project-description {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.project-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.85rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
}

.project-lang {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--secondary);
}

.lang-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--secondary);
}

.project-stars {
    color: var(--amber);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 600;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 7, 12, 0.85);
    backdrop-filter: blur(14px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35 ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-container {
    width: 100%;
    max-width: 620px;
    max-height: 92vh;
    overflow-y: auto;
    background: var(--bg-modal);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    padding: 2rem;
    position: relative;
    transform: translateY(30px) scale(0.95);
    transition: var(--trans-spring);
}

.modal-overlay.active .modal-container {
    transform: translateY(0) scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--trans-fast);
}

.modal-close-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.modal-header {
    margin-bottom: 1.75rem;
    text-align: center;
}

.modal-title {
    font-size: 1.7rem;
    margin-bottom: 0.4rem;
}

.modal-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 2.5rem;
}

.contact-info-card {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border: 1px solid rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--text-sub);
}

.contact-val {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
}

.social-links {
    display: flex;
    gap: 0.85rem;
    margin-top: 0.75rem;
}

.social-icon-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--trans-spring);
}

.social-icon-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    transform: translateY(-4px) scale(1.1);
}

.footer {
    padding: 2.5rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-sub);
    font-size: 0.85rem;
}

/* ==========================================================================
   100% Mobile & Small Device Responsiveness Overhaul (320px - 768px)
   ========================================================================== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }
    
    .hero-content {
        align-items: center;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .about-grid, .contact-grid, .edu-grid {
        grid-template-columns: 1fr;
    }

    .why-us-grid {
        grid-template-columns: 1fr;
    }

    .why-card {
        grid-column: auto !important;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14.5px;
    }

    .container {
        padding: 0 1rem !important;
        width: 100% !important;
        max-width: 100% !important;
    }

    .navbar {
        padding: 0.75rem 0;
        background: var(--bg-dark);
        border-bottom: 1px solid var(--border-color);
    }

    [data-theme="light"] .navbar {
        background: #ffffff;
        border-bottom-color: #e2e8f0;
    }

    .brand-name {
        font-size: 1.05rem !important;
        white-space: nowrap !important;
    }

    .brand-subtitle {
        font-size: 0.675rem !important;
    }

    .nav-actions {
        display: flex !important;
        align-items: center !important;
        gap: 0.45rem !important;
        flex-shrink: 0 !important;
    }

    .lang-toggle-btn {
        height: 36px !important;
        padding: 0 0.6rem !important;
        font-size: 0.8rem !important;
        gap: 0.35rem !important;
        border-radius: var(--radius-sm) !important;
    }

    .theme-toggle-btn {
        width: 36px !important;
        height: 36px !important;
        font-size: 0.9rem !important;
        border-radius: 50% !important;
    }

    .nav-whatsapp-btn {
        display: none !important;
    }

    .mobile-toggle {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 36px !important;
        height: 36px !important;
        font-size: 1.15rem !important;
        padding: 0 !important;
        background: rgba(99, 102, 241, 0.12) !important;
        border: 1px solid rgba(99, 102, 241, 0.28) !important;
        border-radius: var(--radius-sm) !important;
    }

    [data-theme="light"] .mobile-toggle {
        background: rgba(99, 102, 241, 0.08) !important;
        border-color: rgba(99, 102, 241, 0.25) !important;
        color: #0f172a !important;
    }

    .nav-menu {
        position: fixed;
        top: 66px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 66px);
        background: rgba(11, 15, 25, 0.98);
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: 1.25rem;
        transition: var(--trans-normal);
        z-index: 999;
        padding: 2.25rem 1.5rem 3rem 1.5rem;
        overflow-y: auto;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        will-change: left;
    }

    [data-theme="light"] .nav-menu {
        background: rgba(255, 255, 255, 0.98) !important;
        border-top-color: #e2e8f0 !important;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08) !important;
    }

    .glass-card {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-whatsapp {
        display: inline-flex !important;
        width: 85% !important;
        margin-top: 0.5rem;
    }

    .desktop-only-btn {
        display: none !important;
    }

    .mobile-nav-settings {
        display: flex !important;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        margin: 0.75rem 0 0.25rem 0;
        padding: 0.4rem 0.85rem;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-full);
    }

    [data-theme="light"] .mobile-nav-settings {
        background: #f1f5f9 !important;
        border-color: #cbd5e1 !important;
    }

    .hero {
        padding-top: 5.5rem !important;
        padding-bottom: 2.5rem !important;
        min-height: auto;
    }

    .page-banner {
        padding-top: 5.5rem !important;
        padding-bottom: 2rem !important;
    }

    .page-title {
        font-size: 1.85rem !important;
        line-height: 1.3 !important;
    }

    .live-app-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
        text-align: center !important;
    }

    .live-app-grid > div {
        text-align: center !important;
    }

    .live-app-grid h3 {
        font-size: 1.35rem !important;
        text-align: center !important;
        width: 100% !important;
    }

    .live-app-grid div[style*="display: flex"] {
        justify-content: center !important;
    }

    .upcoming-projects-grid {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }

    .chapter-grid {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }

    .chapter-card {
        padding: 1.5rem !important;
    }

    .hero-title {
        font-size: 1.85rem !important;
        line-height: 1.3 !important;
        letter-spacing: normal !important;
        margin-bottom: 1rem !important;
        word-break: break-word !important;
    }

    .hero-description {
        font-size: 0.95rem !important;
        line-height: 1.6 !important;
        margin-bottom: 1.5rem !important;
    }

    .hero-cta {
        flex-direction: column !important;
        width: 100% !important;
        gap: 0.75rem !important;
        margin-bottom: 2rem !important;
    }

    .hero-cta .btn, .btn-lg {
        width: 100% !important;
        max-width: 100% !important;
        white-space: normal !important;
        word-break: break-word !important;
        text-align: center !important;
        padding: 0.85rem 1.1rem !important;
        font-size: 0.95rem !important;
        height: auto !important;
        min-height: 48px;
    }

    .status-badge {
        font-size: 0.775rem !important;
        padding: 0.4rem 0.85rem !important;
        white-space: normal !important;
        text-align: center !important;
        max-width: 100% !important;
        line-height: 1.4 !important;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.85rem !important;
        padding-top: 1.5rem !important;
        text-align: center;
    }

    .stat-number {
        font-size: 1.5rem !important;
    }

    .stat-label {
        font-size: 0.75rem !important;
    }

    .avatar-frame {
        width: 220px !important;
        height: 220px !important;
    }

    .hero-visual {
        margin-top: 1rem;
        padding: 0 10px;
    }

    .floating-badge {
        display: flex !important;
        padding: 0.45rem 0.7rem !important;
        gap: 0.5rem !important;
        border-radius: var(--radius-sm) !important;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35) !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        background: rgba(15, 23, 42, 0.96) !important;
        z-index: 15 !important;
    }

    [data-theme="light"] .floating-badge {
        background: rgba(255, 255, 255, 0.96) !important;
        box-shadow: 0 8px 20px rgba(99, 102, 241, 0.15) !important;
    }

    .badge-top {
        top: -12px !important;
        left: 2px !important;
    }

    .badge-bottom {
        bottom: -12px !important;
        right: 2px !important;
    }

    .badge-icon {
        font-size: 1.15rem !important;
    }

    .badge-text-title {
        font-size: 0.75rem !important;
    }

    .badge-text-sub {
        font-size: 0.65rem !important;
    }

    .section {
        padding: 3.25rem 0 !important;
    }

    .section-title {
        font-size: 1.65rem !important;
        line-height: 1.3 !important;
    }

    .section-subtitle {
        font-size: 0.925rem !important;
    }

    .modal-container {
        padding: 1.25rem !important;
        width: 95% !important;
    }

    .about-bio-card {
        padding: 1.25rem !important;
    }

    .form-row-2col {
        grid-template-columns: 1fr !important;
        gap: 0.75rem !important;
    }

    .subject-grid, .chapter-grid, .about-grid, .contact-grid, .edu-grid, .testimonial-grid {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }

    /* Mobile Enhancements for Teaching Modes Banner & Cards */
    .teaching-mode-card {
        padding: 1.25rem 1.1rem !important;
        margin-top: 2rem !important;
    }

    .teaching-mode-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
    }

    /* Mobile Enhancements for Testimonial Cards */
    .testimonial-card {
        padding: 1.25rem 1.1rem !important;
    }

    .testimonial-card .quote-mark {
        font-size: 2.2rem !important;
        right: 12px !important;
        top: 10px !important;
    }

    /* Mobile Enhancements for Multi-Column Footer */
    .footer {
        padding: 3rem 0 1.75rem 0 !important;
    }

    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 2rem !important;
        margin-bottom: 2rem !important;
    }

    .footer-links-list li a {
        display: inline-block;
        padding: 0.3rem 0;
        min-height: 38px;
        line-height: 32px;
    }

    /* Mobile Hero / Zero Section Precision Polish */
    .hero-focus-tag {
        font-size: 1.05rem !important;
        margin-bottom: 0.95rem !important;
    }
}

/* ==========================================================================
   Universal PC/Desktop Grid Rule (Guarantees Side-by-Side PC Display everywhere)
   ========================================================================== */
@media (min-width: 768px) {
    .subject-grid-academic {
        display: grid !important;
        grid-template-columns: 1fr 1fr 1fr !important;
        gap: 1.5rem !important;
        width: 100% !important;
    }

    .subject-grid-skills {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 1.5rem !important;
        width: 100% !important;
    }

    /* Reset legacy column spans to prevent vertical stacking */
    .subject-grid-academic .subject-card,
    .subject-grid-skills .subject-card {
        grid-column: auto !important;
    }
}

/* ==========================================================================
   Premium Extensions & Interactive Enhancements
   ========================================================================== */

/* 1. Animated Nav Link Underline */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--grad-primary);
    border-radius: 2px;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 2. Floating Scroll-to-Top Button */
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--grad-primary);
    color: #ffffff;
    border: none;
    outline: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.45);
    z-index: 990;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.85);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.scroll-top-btn:hover {
    transform: translateY(-5px) scale(1.08);
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.65);
}

/* 3. Sticky Section Progress Dots (Desktop Left Side) */
.section-progress-dots {
    position: fixed;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    z-index: 980;
}

.progress-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid var(--border-glow);
    transition: all 0.3s ease;
    cursor: pointer;
}

[data-theme="light"] .progress-dot {
    background: rgba(99, 102, 241, 0.2);
}

.progress-dot.active,
.progress-dot:hover {
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary);
    transform: scale(1.4);
}

@media (max-width: 1100px) {
    .section-progress-dots {
        display: none !important;
    }
}

/* 4. Typewriter Effect Cursor */
.typewriter-cursor {
    display: inline-block;
    color: var(--accent);
    margin-left: 2px;
    animation: blink 0.8s infinite alternate;
}

@keyframes blink {
    0% { opacity: 1; }
    100% { opacity: 0; }
}

/* 5. Animated Skill Progress Bars */
.progress-track {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 99px;
    overflow: hidden;
    margin-top: 0.25rem;
}

[data-theme="light"] .progress-track {
    background: rgba(99, 102, 241, 0.12);
}

.progress-fill {
    height: 100%;
    border-radius: 99px;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 6. Card Mouse-Tracking Spotlight Glow */
.glass-card {
    position: relative;
    overflow: hidden;
}

/* 7. Section Wave Divider */
.section-divider-wave {
    width: 100%;
    line-height: 0;
    overflow: hidden;
    margin: 1.5rem 0;
}

.section-divider-wave svg {
    width: 100%;
    height: 45px;
}

/* ==========================================================================
   Student & Parent Attracting Enhancements
   ========================================================================== */

/* Urgent Status Badge Pulsing Effect */
.pulse-badge {
    animation: badgePulse 2.5s infinite ease-in-out;
    border: 1px solid rgba(16, 185, 129, 0.4) !important;
}

@keyframes badgePulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Audience Portal Welcome Cards */
.audience-card {
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease;
}

.audience-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -10px rgba(16, 185, 129, 0.2);
}

.student-welcome-card:hover {
    box-shadow: 0 20px 40px -10px rgba(6, 182, 212, 0.25);
}

.parent-welcome-card:hover {
    box-shadow: 0 20px 40px -10px rgba(16, 185, 129, 0.25);
}

/* Demo Banner Glow & Pulse Button */
.demo-highlight-banner {
    position: relative;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
}

.demo-highlight-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 60%);
    pointer-events: none;
    animation: rotateGlow 10s linear infinite;
}

@keyframes rotateGlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

[data-theme="light"] .audience-card.student-welcome-card {
    background: linear-gradient(145deg, rgba(6, 182, 212, 0.08) 0%, rgba(255, 255, 255, 0.95) 100%) !important;
    border-color: rgba(6, 182, 212, 0.3) !important;
}

[data-theme="light"] .audience-card.parent-welcome-card {
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.08) 0%, rgba(255, 255, 255, 0.95) 100%) !important;
    border-color: rgba(16, 185, 129, 0.3) !important;
}

[data-theme="light"] .demo-highlight-banner {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%) !important;
    border-color: rgba(16, 185, 129, 0.4) !important;
}

/* ==========================================================================
   Form Dropdown Shaking & Misalignment Permanent Fix
   ========================================================================== */
#tuition-apply .glass-card,
.glass-card:has(#tuitionApplyForm),
.glass-card:has(.form-select) {
    transform: none !important;
    overflow: visible !important;
    will-change: auto !important;
}

#tuition-apply .glass-card:hover,
.glass-card:has(#tuitionApplyForm):hover,
.glass-card:has(.form-select):hover {
    transform: none !important;
}

.form-group {
    position: relative;
    z-index: 1;
}

.form-group:focus-within {
    z-index: 10;
}

.form-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 1.1rem center !important;
    background-size: 1.1rem !important;
    padding-right: 2.75rem !important;
    cursor: pointer;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    transition: border-color 0.15s ease, box-shadow 0.15s ease !important;
    transform: none !important;
    will-change: auto !important;
}

.form-select option {
    background-color: #0c1220;
    color: #f3f4f6;
    padding: 12px;
}

[data-theme="light"] .form-select option {
    background-color: #ffffff;
    color: #0f172a;
}

/* Prevent mobile active scaling on form cards that causes popup jump */
@media (max-width: 768px) {
    #tuition-apply .glass-card:active,
    .glass-card:has(#tuitionApplyForm):active {
        transform: none !important;
    }
}

/* ==========================================================================
   "Demo Book" Button Dynamic Pulsing & Glowing Animation Effect
   ========================================================================== */
@keyframes demoBtnZoomPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
    }
    50% {
        transform: scale(1.04);
        box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6), 0 0 15px rgba(16, 185, 129, 0.4);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
    }
}

.open-tuition-modal,
.hero-cta .btn-accent,
.demo-highlight-banner .btn-accent {
    animation: demoBtnZoomPulse 2.8s ease-in-out infinite;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.open-tuition-modal:hover,
.hero-cta .btn-accent:hover,
.demo-highlight-banner .btn-accent:hover {
    animation-play-state: paused;
    transform: scale(1.07) translateY(-2px) !important;
    box-shadow: 0 12px 30px rgba(16, 185, 129, 0.7) !important;
}

/* ==========================================================================
   Continuous Infinite Auto-Scrolling Testimonial Slider (Desktop & Mobile)
   ========================================================================== */
.testimonial-slider-wrapper {
    overflow: hidden;
    width: 100%;
    position: relative;
    padding: 1.25rem 0;
    mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
}

.testimonial-slider-track {
    display: flex;
    gap: 1.5rem;
    width: max-content;
    animation: testimonialAutoScroll 35s linear infinite;
    will-change: transform;
}

.testimonial-slider-track:hover,
.testimonial-slider-track:active {
    animation-play-state: paused;
}

.testimonial-card-slide {
    width: 330px;
    flex-shrink: 0;
    margin: 0;
}

@keyframes testimonialAutoScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-50% - 0.75rem));
    }
}

@media (max-width: 768px) {
    .testimonial-card-slide {
        width: 290px;
    }
    .testimonial-slider-track {
        animation-duration: 25s;
    }
}

/* ==========================================================================
   WhatsApp Shiny Glass Sweep Animation & Desktop Navbar Spacing Fix
   ========================================================================== */
.btn-whatsapp,
.nav-whatsapp-btn,
.mobile-menu-whatsapp,
a[href*="wa.me"] {
    position: relative;
    overflow: hidden;
}

.btn-whatsapp::before,
.nav-whatsapp-btn::before,
.mobile-menu-whatsapp::before,
a[href*="wa.me"]::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -75%;
    width: 50%;
    height: 200%;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.45) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(25deg);
    animation: shinyShimmerSweep 3.2s infinite ease-in-out;
    pointer-events: none;
}

@keyframes shinyShimmerSweep {
    0% {
        left: -85%;
    }
    30% {
        left: 140%;
    }
    100% {
        left: 140%;
    }
}

/* Desktop Navbar Menu Spacing Fix */
@media (min-width: 992px) {
    .nav-menu {
        gap: 1.5rem !important;
    }
    .nav-link {
        font-size: 0.92rem;
        padding: 0.2rem 0.25rem;
    }
    .nav-actions {
        gap: 1rem;
    }
}

/* Special Poster Highlight Ribbon */
.special-highlight-ribbon {
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.1);
    transition: var(--trans-normal);
}

.special-highlight-ribbon:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.2);
}

@media (max-width: 600px) {
    .special-highlight-ribbon {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.6rem;
        padding: 1rem 1.25rem !important;
    }
}

/* ==========================================================================
   Course Features & Study Methodology Grid Styles
   ========================================================================== */
.course-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (min-width: 992px) {
    .course-features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    padding: 1.85rem 1.6rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    transition: var(--trans-spring);
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-color);
}

.feature-title {
    font-size: 1.22rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-main);
    line-height: 1.35;
}

.feature-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

[data-theme="light"] .feature-title {
    color: #0f172a !important;
}

[data-theme="light"] .feature-desc {
    color: #334155 !important;
}

[data-theme="light"] .feature-icon {
    border-color: rgba(99, 102, 241, 0.2) !important;
}