/* ============================================
   TopLearnerBase Landing Page Styles
   Design: Modern EdTech with vibrant accents
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary-dark: #0A2647;
    --primary-blue: #144272;
    --primary-light: #205295;
    
    /* Accent Colors */
    --accent-orange: #FF6B35;
    --accent-yellow: #FFD93D;
    --accent-green: #00D68F;
    --accent-purple: #8B5CF6;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 50%, var(--primary-light) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-yellow) 100%);
    --gradient-hero: linear-gradient(135deg, #0A2647 0%, #144272 40%, #205295 100%);
    
    /* 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);
    --shadow-glow: 0 0 40px rgba(255, 107, 53, 0.3);
    
    /* Typography */
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Poppins', var(--font-sans);
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-max: 1200px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--gray-900);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
    border: none;
    box-shadow: var(--shadow-md);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--accent-orange);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-family: var(--font-display);
    margin-bottom: 16px;
}

.section-description {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    padding: 12px 0;
}

.navbar.scrolled .logo-text,
.navbar.scrolled .nav-links a {
    color: var(--gray-800);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 800;
    color: var(--white);
}

.logo-text .highlight {
    color: var(--accent-orange);
}

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

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: var(--transition-base);
}

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

.nav-actions .btn-outline {
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

.nav-actions .btn-outline:hover {
    background: var(--white);
    color: var(--primary-dark);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--white);
    transition: var(--transition-base);
}

.navbar.scrolled .hamburger span {
    background: var(--gray-800);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

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

.floating-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-orange);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-yellow);
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-green);
    top: 50%;
    left: 10%;
    animation-delay: -10s;
}

.shape-4 {
    width: 150px;
    height: 150px;
    background: var(--accent-purple);
    bottom: 30%;
    right: 20%;
    animation-delay: -15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(20px, 10px) scale(1.05);
    }
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    color: var(--white);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 14px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.badge-icon {
    font-size: 16px;
}

.hero-title {
    font-size: clamp(40px, 6vw, 64px);
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--white);
}

.hero-title .gradient-text {
    display: inline-block;
}

.hero-description {
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--accent-yellow);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* Hero Visual - Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.phone-mockup {
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.phone-mockup:hover {
    transform: rotateY(0) rotateX(0);
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 30px;
    overflow: hidden;
}

.app-preview {
    padding: 30px 20px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: 50%;
}

.greeting {
    display: flex;
    flex-direction: column;
}

.greeting-text {
    font-size: 12px;
    color: var(--gray-500);
}

.user-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
}

.preview-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
}

.progress-ring {
    position: relative;
    width: 120px;
    height: 120px;
}

.progress-ring svg {
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: #e5e7eb;
    stroke-width: 8;
}

.progress-fill {
    fill: none;
    stroke: url(#gradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    transition: stroke-dashoffset 1s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
}

.progress-label {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 8px;
}

.preview-cards {
    display: flex;
    gap: 12px;
    flex: 1;
    align-items: flex-end;
}

.mini-card {
    flex: 1;
    padding: 16px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--white);
}

.mini-card i {
    font-size: 24px;
}

.mini-card span {
    font-size: 12px;
    font-weight: 500;
}

.card-blue {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.card-orange {
    background: var(--gradient-accent);
}

.card-green {
    background: linear-gradient(135deg, #10b981, #059669);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.6);
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

.scroll-indicator span {
    font-size: 12px;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
    padding: var(--section-padding);
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.feature-icon-1 {
    background: linear-gradient(135deg, #818cf8, #6366f1);
    color: var(--white);
}

.feature-icon-2 {
    background: var(--gradient-accent);
    color: var(--white);
}

.feature-icon-3 {
    background: linear-gradient(135deg, #34d399, #10b981);
    color: var(--white);
}

.feature-icon-4 {
    background: linear-gradient(135deg, #f472b6, #ec4899);
    color: var(--white);
}

.feature-icon-5 {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
    color: var(--white);
}

.feature-icon-6 {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--white);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.feature-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 12px;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */
.how-it-works {
    padding: var(--section-padding);
    background: var(--white);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    position: relative;
}

.step-number {
    font-family: var(--font-display);
    font-size: 72px;
    font-weight: 800;
    color: var(--gray-100);
    line-height: 1;
    margin-bottom: 16px;
}

.step-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 14px;
    color: var(--gray-500);
    max-width: 180px;
}

.step-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    margin-top: 20px;
    box-shadow: var(--shadow-lg);
}

.step-connector {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--gray-200), var(--accent-orange), var(--gray-200));
    margin: 0 -20px;
    margin-bottom: 60px;
}

/* ============================================
   DOWNLOAD SECTION
   ============================================ */
.download {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: -1;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-text {
    color: var(--white);
}

.download-text .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.download-text .section-title {
    color: var(--white);
}

.download-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--white);
    transition: var(--transition-base);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.download-btn i {
    font-size: 32px;
}

.download-btn-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.download-btn-small {
    font-size: 11px;
    opacity: 0.8;
}

.download-btn-big {
    font-size: 18px;
    font-weight: 600;
}

.download-qr {
    display: flex;
    align-items: center;
    gap: 20px;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 10px;
}

.qr-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    gap: 8px;
}

.qr-placeholder i {
    font-size: 40px;
}

.qr-placeholder span {
    font-size: 12px;
}

.qr-hint {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.download-visual {
    display: flex;
    justify-content: center;
}

.phones-display {
    position: relative;
    width: 400px;
    height: 500px;
}

.phone {
    position: absolute;
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 30px;
    padding: 8px;
    box-shadow: var(--shadow-2xl);
}

.phone-back {
    width: 200px;
    height: 400px;
    left: 0;
    top: 50px;
    transform: rotate(-10deg);
    opacity: 0.7;
}

.phone-front {
    width: 220px;
    height: 440px;
    right: 0;
    top: 30px;
    transform: rotate(5deg);
    z-index: 1;
}

.phone-screen-mini {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-dark), var(--primary-light));
    border-radius: 24px;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */
.testimonials {
    padding: var(--section-padding);
    background: var(--gray-50);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.testimonial-content {
    margin-bottom: 24px;
}

.stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.stars i {
    color: var(--accent-yellow);
    font-size: 16px;
}

.testimonial-content p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
}

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

.author-name {
    font-weight: 600;
    color: var(--gray-800);
}

.author-title {
    font-size: 13px;
    color: var(--gray-500);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--section-padding);
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-description {
    font-size: 16px;
    color: var(--gray-500);
    margin-bottom: 32px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
}

.contact-text {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 13px;
    color: var(--gray-500);
}

.contact-value {
    font-weight: 500;
    color: var(--gray-800);
}

.qr-codes {
    display: flex;
    gap: 24px;
}

.qr-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.qr-box {
    width: 100px;
    height: 100px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--accent-green);
}

.qr-item span {
    font-size: 13px;
    color: var(--gray-500);
}

.contact-form-wrapper {
    background: var(--gray-50);
    padding: 40px;
    border-radius: var(--radius-xl);
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 15px;
    transition: var(--transition-base);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-orange);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--gray-900);
    padding: 80px 0 30px;
    color: var(--gray-400);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    margin: 20px 0;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--accent-orange);
    transform: translateY(-3px);
}

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

.footer-column h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
}

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

.footer-column a {
    font-size: 14px;
    color: var(--gray-400);
}

.footer-column a:hover {
    color: var(--accent-orange);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 13px;
}

/* ============================================
   AI CHAT WIDGET
   ============================================ */
.ai-chat-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
}

.chat-toggle {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: var(--transition-base);
    position: relative;
}

.chat-toggle:hover {
    transform: scale(1.1);
}

.chat-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent-green);
    color: var(--white);
    font-size: 10px;
    font-weight: 700;
    padding: 3px 6px;
    border-radius: var(--radius-full);
}

.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    height: 520px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.chat-window.active {
    display: flex;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-header {
    background: var(--gradient-hero);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--white);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-title {
    font-weight: 600;
    font-size: 15px;
}

.chat-status {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.9;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.chat-close {
    background: none;
    border: none;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.chat-close:hover {
    opacity: 1;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-message {
    display: flex;
    gap: 10px;
    max-width: 85%;
}

.chat-message.bot {
    align-self: flex-start;
}

.chat-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 32px;
    height: 32px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-size: 14px;
    flex-shrink: 0;
}

.chat-message.user .message-avatar {
    background: var(--gradient-accent);
    color: var(--white);
}

.message-content {
    background: var(--gray-100);
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    line-height: 1.6;
}

.chat-message.user .message-content {
    background: var(--primary-dark);
    color: var(--white);
}

.message-content p {
    margin-bottom: 8px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.chat-quick-replies {
    padding: 0 20px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.quick-reply {
    padding: 8px 14px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 13px;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition-fast);
}

.quick-reply:hover {
    background: var(--primary-dark);
    color: var(--white);
    border-color: var(--primary-dark);
}

.chat-input-area {
    padding: 16px 20px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: 10px;
}

#chatInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-family: var(--font-sans);
    transition: var(--transition-fast);
}

#chatInput:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.chat-send {
    width: 44px;
    height: 44px;
    background: var(--gradient-accent);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition-base);
}

.chat-send:hover {
    transform: scale(1.05);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    width: fit-content;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    50% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
    }
    
    .hero-description {
        margin: 0 auto 32px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .download-qr {
        justify-content: center;
    }
    
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        justify-items: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        color: var(--gray-800);
        padding: 12px 0;
    }
    
    .nav-actions {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        flex-direction: column;
        gap: 40px;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }
    
    .chat-window {
        width: calc(100vw - 40px);
        right: -10px;
        bottom: 70px;
        height: 480px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .phone-frame {
        width: 240px;
        height: 500px;
    }
    
    .phones-display {
        width: 280px;
        height: 400px;
    }
    
    .phone-back {
        width: 150px;
        height: 300px;
    }
    
    .phone-front {
        width: 170px;
        height: 340px;
    }
    
    .qr-codes {
        flex-direction: column;
        align-items: center;
    }
}