/*
================================================================
   TECH ROADMAP - STYLE SHEET (CORE LAYOUT & COMPONENTS)
================================================================
   Handles the complete layout, typography, structural patterns,
   hover animations, and responsive breakpoints. Works with 
   css/themes.css variable tokens.
================================================================
*/

/* ==========================================
   1. RESET & BASE PROPERTIES
   ========================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Transitions constants */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout Constants */
    --header-height: 80px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    /* Smooth transition when changing visual themes */
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    outline: none;
}

ul {
    list-style: none;
}

/* Background canvas positioning */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none; /* User clicks pass through canvas to elements beneath */
    opacity: var(--particle-opacity, 0.8);
    transition: opacity var(--transition-normal);
}

/* Layout width limit helper */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Accent gradient text generator */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight {
    color: var(--accent-primary);
}

/* ==========================================
   2. BUTTONS & BADGES
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
    font-family: 'Outfit', sans-serif;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: #ffffff !important;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid var(--accent-primary);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--accent-primary);
    color: #ffffff !important;
    box-shadow: 0 4px 14px var(--accent-glow);
    transform: translateY(-2px);
}

.btn-card {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    width: 100%;
    padding: 10px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    margin-top: auto; /* Push buttons to card bottoms in flex columns */
}

.btn-card:hover {
    background-color: var(--accent-primary);
    color: #ffffff !important;
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--accent-primary);
    margin-bottom: 20px;
}

/* ==========================================
   3. HEADER & NAVIGATION BAR
   ========================================== */
.header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header.scrolled {
    background-color: var(--bg-secondary);
    backdrop-filter: var(--card-backdrop, blur(8px));
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.6rem;
    display: inline-block;
    animation: pulse 2s infinite ease-in-out;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover {
    color: var(--text-primary);
}

/* Sliding active link border */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-primary);
    transition: width var(--transition-normal);
}

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

.nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
}

/* Theme selector toggle elements */
.theme-switcher-wrapper {
    position: relative;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: border var(--transition-fast), background var(--transition-fast);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

.theme-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-md);
    width: 170px;
    padding: 8px;
    z-index: 1010;
    display: none; /* Dynamic visibility toggled by JS classes */
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.theme-dropdown.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.theme-dropdown li {
    margin-bottom: 4px;
}

.theme-dropdown li:last-child {
    margin-bottom: 0;
}

.theme-opt-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    font-size: 0.88rem;
    font-weight: 500;
    text-align: left;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-opt-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.theme-opt-btn.active {
    color: var(--accent-primary);
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.theme-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.1);
}
.theme-dark-indicator { background-color: #6366f1; }
.theme-yellow-indicator { background-color: #d97706; }
.theme-green-indicator { background-color: #10b981; }

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
}

.mobile-nav-toggle .bar {
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 4px;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ==========================================
   4. HERO SECTION
   ========================================== */
.hero-section {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
    padding: 80px 24px;
    min-height: calc(85vh - var(--header-height));
    position: relative;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero graphic visual floaters */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--border-radius-md);
    width: 250px;
    position: absolute;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-slow), border-color var(--transition-normal);
}

.floating-card:hover {
    border-color: var(--accent-primary);
}

/* Cards floats positioning values */
.floating-card.c1 {
    top: 20px;
    left: 20px;
    animation: float-up 6s infinite ease-in-out;
}

.floating-card.c2 {
    bottom: 30px;
    right: 20px;
    animation: float-down 8s infinite ease-in-out;
}

.floating-card.c3 {
    top: 150px;
    left: 120px;
    animation: float-up 7s infinite ease-in-out;
    animation-delay: 1.5s;
    z-index: 2;
}

.card-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.card-tag.html { background-color: rgba(227, 76, 38, 0.15); color: #e34c26; }
.card-tag.js { background-color: rgba(247, 223, 30, 0.15); color: #b59f14; }
.card-tag.react { background-color: rgba(97, 218, 251, 0.15); color: #00bcd4; }

.floating-card h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.floating-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.card-progress {
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
}

.card-progress span {
    display: block;
    height: 100%;
    background-color: var(--accent-primary);
    border-radius: 10px;
}

.visual-glow-glow {
    position: absolute;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, var(--accent-glow) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    filter: blur(20px);
}

/* ==========================================
   5. POPULAR COURSES SECTION
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
    padding-top: 40px;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.course-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.course-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md), var(--glow-shadow);
}

.course-card-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
}

.level-beginner { background-color: rgba(16, 185, 129, 0.12); color: #10b981; }
.level-intermediate { background-color: rgba(245, 158, 11, 0.12); color: #f59e0b; }
.level-advanced { background-color: rgba(99, 102, 241, 0.12); color: #6366f1; }

.course-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.course-title {
    font-size: 1.35rem;
    margin-bottom: 12px;
}

.course-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    flex-grow: 1;
}

.section-footer {
    text-align: center;
    margin-top: 40px;
    margin-bottom: 60px;
}

/* ==========================================
   6. LEARNING PATHS SHOWCASE
   ========================================== */
.learning-paths-section {
    padding: 60px 24px;
}

.paths-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    gap: 20px;
    margin-top: 40px;
}

.path-step {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 30px;
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    z-index: 5;
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.path-step:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.step-num {
    background-color: var(--accent-primary);
    color: #ffffff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
    box-shadow: 0 4px 10px var(--accent-glow);
}

.step-content h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.path-duration {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    background-color: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 4px;
}

.path-line {
    height: 3px;
    flex-grow: 1;
    background: repeating-linear-gradient(90deg, var(--border-color), var(--border-color) 8px, transparent 8px, transparent 16px);
    max-width: 100px;
}

/* ==========================================
   7. WHY CHOOSE US
   ========================================== */
.why-choose-us {
    padding: 60px 24px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.feature-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 36px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.feature-box:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.feature-icon {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.feature-box h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ==========================================
   8. STUDENT & TEACHER BENEFITS
   ========================================== */
.benefits-section {
    padding: 60px 24px 80px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.benefit-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 48px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
}

.student-benefits::before { background-color: var(--accent-primary); }
.teacher-benefits::before { background-color: var(--accent-secondary); }

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 24px;
}

.benefit-card h2 {
    font-size: 1.8rem;
    margin-bottom: 24px;
}

.benefit-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.benefit-list li {
    font-size: 0.98rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 28px;
}

.benefit-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-primary);
    font-weight: 700;
}

.teacher-benefits .benefit-list li::before {
    color: var(--accent-secondary);
}

/* ==========================================
   9. FEEDBACK FORM & REVIEW ITEMS
   ========================================== */
.feedback-container {
    max-width: 600px;
    margin: 40px auto 80px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 48px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.feedback-container h1 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    text-align: center;
}

.feedback-container .subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 36px;
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 1rem;
    font-family: inherit;
    border-radius: var(--border-radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: var(--glow-shadow);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.error-message {
    font-size: 0.82rem;
    color: #ef4444;
    margin-top: 6px;
    display: none;
}

.form-group.invalid .form-control {
    border-color: #ef4444;
}

.form-group.invalid .error-message {
    display: block;
}

.form-alert {
    padding: 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 24px;
    display: none;
    font-size: 0.95rem;
    font-weight: 500;
}

.form-alert.success {
    display: block;
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid #10b981;
    color: #10b981;
}

.form-alert.danger {
    display: block;
    background-color: rgba(239, 68, 68, 0.15);
    border: 1px solid #ef4444;
    color: #ef4444;
}

.submissions-section {
    margin-top: 60px;
}

.submissions-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.submission-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.submission-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.submission-name {
    font-weight: 700;
    color: var(--text-primary);
}

.submission-msg {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ==========================================
   10. FOOTER SECTION
   ========================================== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
    margin-top: 60px;
    position: relative;
    z-index: 10;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.footer-tagline {
    font-size: 0.92rem;
    color: var(--text-secondary);
    max-width: 250px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    font-size: 1.3rem;
    transition: transform var(--transition-fast);
}

.social-links a:hover {
    transform: scale(1.15);
}

.footer-links h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent-primary);
    padding-left: 4px;
}

.footer-theme-link {
    font-size: 0.92rem;
    color: var(--text-secondary);
    background: none;
    border: none;
    padding: 0;
    text-align: left;
    transition: color var(--transition-fast), padding var(--transition-fast);
}

.footer-theme-link:hover {
    color: var(--accent-primary);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ==========================================
   11. KEYFRAME ANIMATIONS
   ========================================== */
@keyframes float-up {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-12px) rotate(1.5deg);
    }
}

@keyframes float-down {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(12px) rotate(-1.5deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 0px var(--accent-glow));
    }
    50% {
        transform: scale(1.08);
        filter: drop-shadow(0 0 8px var(--accent-glow));
    }
}

/* ==========================================
   12. RESPONSIVE MEDIA QUERIES (RESPONSIVE SYSTEM)
   ========================================== */

/* Tablet layouts (max width 1024px) */
@media (max-width: 1024px) {
    .hero-section {
        grid-template-columns: 1fr;
        gap: 60px;
        padding: 60px 24px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        height: 350px;
        max-width: 500px;
        margin: 0 auto;
        width: 100%;
    }
    
    .floating-card.c1 { left: 10px; }
    .floating-card.c2 { right: 10px; }
    .floating-card.c3 { left: 50%; transform: translateX(-50%); top: 100px; }

    .paths-flow {
        flex-direction: column;
        gap: 24px;
    }
    
    .path-line {
        width: 3px;
        height: 40px;
        max-width: none;
        background: repeating-linear-gradient(180deg, var(--border-color), var(--border-color) 8px, transparent 8px, transparent 16px);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
    }
    
    .footer-links:last-child {
        grid-column: span 3;
    }
}

/* Smartphone Portrait & Landscape (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .mobile-nav-toggle {
        display: flex;
        z-index: 1020;
    }
    
    /* Sliding Navigation Menu drawer overlay on Mobile */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 100px 40px 40px;
        gap: 40px;
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-slow);
        z-index: 1015;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 32px;
        width: 100%;
    }
    
    .nav-link {
        font-size: 1.15rem;
    }
    
    /* Cross hamburger layout animations */
    .mobile-nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
    
    /* Remove heavy floats on mobile viewport to save battery & rendering pipelines */
    .hero-visual {
        display: none;
    }
    
    .hero-section {
        min-height: auto;
        padding: 40px 24px;
    }

    .benefit-card {
        padding: 32px;
    }
    
    .feedback-container {
        padding: 32px 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-links:last-child {
        grid-column: span 1;
    }
}