/* ========================================
   Modern Design System - VN Academy
   ======================================== */

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

/* Design Tokens */
:root {
    /* Colors - SUITABLE ACADEMY Orange Palette */
    --color-primary: #E07B3C;
    --color-primary-hover: #C96A2F;
    --color-primary-light: #F4A574;
    --color-secondary: #D4A574;
    --color-accent: #E05A3C;

    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4a4a4a;
    --color-text-tertiary: #6b6b6b;
    --color-text-inverse: #ffffff;

    --color-bg-primary: #ffffff;
    --color-bg-secondary: #faf8f6;
    --color-bg-tertiary: #f5f0eb;

    --color-border: #e8e0d8;
    --color-border-light: #f5f0eb;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Gradients - Warm Orange Tones */
    --gradient-primary: linear-gradient(135deg, #E07B3C 0%, #C96A2F 100%);
    --gradient-accent: linear-gradient(135deg, #F4A574 0%, #E05A3C 100%);
    --gradient-mesh: radial-gradient(at 0% 0%, rgba(224, 123, 60, 0.12) 0px, transparent 50%),
                      radial-gradient(at 100% 0%, rgba(212, 165, 116, 0.12) 0px, transparent 50%),
                      radial-gradient(at 100% 100%, rgba(224, 90, 60, 0.10) 0px, transparent 50%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    line-height: 1.6;
    font-size: 1rem;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.navbar .container {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.logo-image {
    height: 40px;
    width: auto;
    max-height: 40px;
    display: block;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

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

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-weight: var(--font-weight-semibold);
    font-size: 0.9375rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-disabled {
    position: relative;
    opacity: 0.5;
    cursor: not-allowed;
    overflow: visible !important;
}

.btn-disabled:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}

.btn-disabled .tooltip {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--color-text-primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
}

.btn-disabled .tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: var(--color-text-primary);
}

.btn-disabled:hover .tooltip {
    opacity: 1;
    visibility: visible;
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

.btn-text {
    background: transparent;
    color: var(--color-text-primary);
    padding: var(--space-3) 0;
}

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

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

.btn-nav {
    padding: var(--space-2) var(--space-5);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-24) 0 var(--space-20);
    overflow: hidden;
    background: var(--color-bg-primary);
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: var(--gradient-mesh);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(224, 123, 60, 0.25) 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.25) 0%, transparent 70%);
    top: 20%;
    right: -5%;
    animation-delay: 7s;
}

.orb-3 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(224, 90, 60, 0.18) 0%, transparent 70%);
    bottom: -20%;
    left: 40%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-10);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-16);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
    flex-wrap: wrap;
    padding: var(--space-8);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.stat-number::after {
    content: '+';
    color: var(--color-primary);
}

.stat-number[data-count="95"]::after {
    content: '%';
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-medium);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ========================================
   Social Proof Section
   ======================================== */

.social-proof {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.social-proof-text {
    text-align: center;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-6);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.company-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.company-logo {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-tertiary);
    opacity: 0.5;
    transition: opacity var(--transition-base);
}

.company-logo:hover {
    opacity: 1;
}

/* ========================================
   Section Styles
   ======================================== */

section {
    padding: var(--space-20) 0;
}

.section-header {
    text-align: center;
    max-width: 850px;
    margin: 0 auto var(--space-16);
}

.section-label {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.intake-notice {
    display: inline-block;
    margin-top: var(--space-6);
    padding: var(--space-3) var(--space-6);
    background: linear-gradient(135deg, rgba(224, 123, 60, 0.1) 0%, rgba(212, 165, 116, 0.1) 100%);
    border: 1px solid var(--color-primary-light);
    border-radius: var(--radius-lg);
}

.intake-text {
    font-size: 1rem;
    color: var(--color-text-primary);
}

.intake-text strong {
    color: var(--color-primary);
}

.section-cta-text {
    margin-top: var(--space-4);
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.career-coach-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.career-coach-link:hover {
    border-bottom-color: var(--color-primary);
}

/* ========================================
   Features Section
   ======================================== */

.features {
    background: var(--color-bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    padding: var(--space-8);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: border-color var(--transition-base);
    cursor: default;
}

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

.feature-icon-wrapper {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(224, 123, 60, 0.1) 0%, rgba(212, 165, 116, 0.1) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    transition: all var(--transition-base);
}


.feature-icon {
    color: var(--color-primary);
    transition: color var(--transition-base);
}


.feature-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========================================
   Skills Development Section
   ======================================== */

.skills-development {
    background: var(--color-bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

.skill-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: border-color var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
}

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

.skill-card-content {
    padding: var(--space-6);
    flex: 1;
}

.skill-icon-wrapper {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(224, 123, 60, 0.1) 0%, rgba(212, 165, 116, 0.1) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    transition: all var(--transition-base);
}


.skill-icon {
    color: var(--color-primary);
    transition: color var(--transition-base);
}


.skill-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.skill-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.skill-topics {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.skill-topics li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.skill-topics svg {
    color: var(--color-success);
    flex-shrink: 0;
}

.skills-cta {
    text-align: center;
    margin-top: var(--space-12);
}

.skills-cta-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-4);
    font-weight: var(--font-weight-medium);
}

/* ========================================
   Courses Section
   ======================================== */

.courses {
    background: var(--color-bg-secondary);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-8);
}

.course-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
}

.course-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.course-featured {
    border: 2px solid var(--color-primary);
    background: linear-gradient(135deg, rgba(224, 123, 60, 0.08) 0%, rgba(212, 165, 116, 0.08) 100%);
}

.course-featured:hover {
    border-color: var(--color-primary-hover);
}

.featured-tag {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-2) var(--space-6);
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    border-bottom-left-radius: var(--radius-lg);
    z-index: 5;
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--space-6);
    padding-bottom: 0;
    position: relative;
    z-index: 10;
}

.course-header:has(> .course-badge:only-child) {
    justify-content: flex-start;
}

.course-badge {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-bestseller {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.badge-new {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
}

.badge-popular {
    background: rgba(236, 72, 153, 0.1);
    color: var(--color-accent);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.stars {
    color: #fbbf24;
    font-size: 0.875rem;
}

.rating-count {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-medium);
}

.course-content {
    padding: var(--space-6);
    flex: 1;
}

.course-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.course-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.course-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.course-features li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.course-features svg {
    color: var(--color-success);
    flex-shrink: 0;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

/* Full-width CTA button when no price is shown */
.course-footer:has(> .btn:only-child) {
    justify-content: stretch;
}

.course-footer > .btn:only-child {
    width: 100%;
    justify-content: center;
}

.course-price {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price-amount {
    font-size: 1.75rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-text-primary);
}

/* ========================================
   Testimonials Section
   ======================================== */

.testimonials {
    background: var(--color-bg-primary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
}

.testimonial-card {
    background: var(--color-bg-secondary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.testimonial-rating {
    margin-bottom: var(--space-4);
}

.testimonial-rating .stars {
    color: #fbbf24;
    font-size: 1rem;
}

.testimonial-content {
    margin-bottom: var(--space-6);
    flex: 1;
}

.testimonial-content p {
    color: var(--color-text-primary);
    font-size: 1.0625rem;
    line-height: 1.7;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.author-title {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    background: var(--color-text-primary);
    color: white;
    text-align: center;
    padding: var(--space-24) 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.3;
}

.cta-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.cta-section .btn-primary {
    background: white;
    color: var(--color-primary);
}

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

.cta-section .btn-text {
    color: white;
}

.cta-section .btn-text:hover {
    color: rgba(255, 255, 255, 0.8);
}

.cta-guarantee {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: var(--font-weight-medium);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--color-text-primary);
    color: white;
    padding: var(--space-20) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr auto auto auto;
    gap: var(--space-16);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-logo .logo-text {
    color: white;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: white;
    transition: all var(--transition-base);
}

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

.footer-links {
    display: contents;
}

.footer-column {
}

.footer-heading {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
    color: white;
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer-made {
    color: rgba(255, 255, 255, 0.5);
}

.footer-ai-link {
    color: var(--color-primary-light);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    margin-left: var(--space-2);
    transition: color var(--transition-fast);
}

.footer-ai-link:hover {
    color: white;
    text-decoration: underline;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: span 2;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: var(--space-20) 0 var(--space-16);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-stats {
        gap: var(--space-4);
    }

    .stat-divider {
        display: none;
    }

    .scroll-indicator {
        display: none;
    }

    .features-grid,
    .courses-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: 1;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-2);
        text-align: center;
    }
}

/* ========================================
   Animation Utilities (data-aos)
   ======================================== */

[data-aos] {
    opacity: 0;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos="fade-down"].aos-animate {
    transform: translateY(0);
}

/* Scroll-based animation trigger */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}