/* ============================================
   BotKonzept - Modern CSS Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    
    /* Neutrals */
    --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;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 100px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--primary-dark);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--gray-900);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

.gradient-text {
    background: var(--gradient-primary);
    -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-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: transparent;
}

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

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

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

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

.btn-white:hover {
    background: var(--gray-100);
    color: var(--primary-dark);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.navbar .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.navbar .logo img {
    height: 40px;
    width: auto;
}

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

.nav-links a {
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    cursor: pointer;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

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

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--primary-light);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-badge i {
    font-size: 0.75rem;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 32px;
    max-width: 540px;
}

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

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Hero Visual - Chat Preview */
.hero-visual {
    position: relative;
    z-index: 2;
}

.chat-preview {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    max-width: 400px;
    margin-left: auto;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--gradient-primary);
    color: var(--white);
}

.chat-avatar {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

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

.chat-name {
    font-weight: 600;
}

.chat-status {
    font-size: 0.75rem;
    opacity: 0.9;
}

.chat-status i {
    font-size: 0.5rem;
    color: var(--success);
    margin-right: 4px;
}

.chat-messages {
    padding: 20px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
}

.message.bot {
    background: var(--gray-100);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message.user {
    background: var(--primary);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.typing {
    padding: 16px 20px;
}

.typing-indicator {
    display: flex;
    gap: 4px;
}

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

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

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

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

.chat-input {
    display: flex;
    padding: 16px 20px;
    border-top: 1px solid var(--gray-200);
    gap: 12px;
}

.chat-input input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    outline: none;
    transition: var(--transition-fast);
}

.chat-input input:focus {
    border-color: var(--primary);
}

.chat-input button {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Hero Background */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-light);
    top: -200px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    left: -100px;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* ============================================
   Trusted By Section
   ============================================ */
.trusted-by {
    padding: 60px 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.trusted-label {
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.trusted-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.logo-placeholder {
    color: var(--gray-400);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ============================================
   Section Header
   ============================================ */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-light);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 20px;
}

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

.feature-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    margin-bottom: 60px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 280px;
    padding: 0 20px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.step-content h3 {
    margin-bottom: 8px;
}

.step-content p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.step-icon {
    margin-top: 20px;
    font-size: 2.5rem;
    color: var(--primary-light);
}

.step-connector {
    width: 100px;
    height: 2px;
    background: var(--gray-300);
    margin-top: 24px;
}

/* Code Preview */
.code-preview {
    max-width: 600px;
    margin: 0 auto;
    background: var(--gray-900);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--gray-800);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27ca40; }

.code-title {
    margin-left: auto;
    color: var(--gray-400);
    font-size: 0.75rem;
}

.code-preview pre {
    padding: 20px;
    margin: 0;
    overflow-x: auto;
}

.code-preview code {
    color: var(--success);
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
}

/* ============================================
   Pricing Section
   ============================================ */
.pricing {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.pricing-card {
    position: relative;
    padding: 40px 32px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

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

.pricing-card.featured {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 8px;
}

.price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-600);
}

.price .amount {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
}

.price .period {
    font-size: 1rem;
    color: var(--gray-500);
}

.pricing-description {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.9375rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    font-size: 0.875rem;
}

.pricing-features li i.fa-check {
    color: var(--success);
}

.pricing-features li i.fa-times {
    color: var(--gray-400);
}

.pricing-features li.disabled {
    color: var(--gray-400);
}

.pricing-note {
    text-align: center;
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.pricing-note i {
    color: var(--accent);
}

.discount-tag {
    background: var(--accent);
    color: var(--white);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* Discount Timeline */
.discount-timeline {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
}

.discount-timeline h3 {
    text-align: center;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.discount-timeline h3 i {
    color: var(--primary);
}

.timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50px;
    right: 50px;
    height: 4px;
    background: var(--gray-300);
    z-index: 0;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.timeline-marker {
    width: 24px;
    height: 24px;
    background: var(--gray-300);
    border: 4px solid var(--white);
    border-radius: 50%;
    margin-bottom: 16px;
}

.timeline-marker.active {
    background: var(--success);
}

.timeline-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.timeline-day {
    font-weight: 600;
    color: var(--gray-700);
}

.timeline-discount {
    color: var(--primary);
    font-weight: 600;
}

.timeline-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

/* ============================================
   Registration Section
   ============================================ */
.register {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

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

.register-info h2 {
    margin-bottom: 16px;
}

.register-info > p {
    color: var(--gray-600);
    font-size: 1.125rem;
    margin-bottom: 32px;
}

.register-benefits {
    list-style: none;
}

.register-benefits li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 1rem;
    color: var(--gray-700);
}

.register-benefits li i {
    color: var(--success);
    font-size: 1.25rem;
}

/* Registration Form */
.register-form-wrapper {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.register-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"] {
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 12px;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--primary);
}

.checkbox-group label {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.4;
}

.checkbox-group label a {
    color: var(--primary);
}

/* Form States */
.form-success,
.form-error {
    text-align: center;
    padding: 40px 20px;
}

.success-icon,
.error-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.success-icon {
    color: var(--success);
}

.error-icon {
    color: var(--error);
}

.form-success h3,
.form-error h3 {
    margin-bottom: 12px;
}

.form-success p,
.form-error p {
    color: var(--gray-600);
    margin-bottom: 20px;
}

.success-details {
    text-align: left;
    background: var(--gray-50);
    padding: 20px;
    border-radius: var(--radius);
    margin-top: 20px;
}

.success-details ol {
    margin-left: 20px;
    margin-top: 12px;
}

.success-details li {
    padding: 4px 0;
    color: var(--gray-600);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question i {
    font-size: 0.875rem;
    color: var(--gray-400);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding-bottom: 24px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    padding: 80px 0;
    background: var(--gradient-primary);
}

.cta-content {
    text-align: center;
    color: var(--white);
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 80px 0 40px;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand .logo img {
    height: 40px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    margin-bottom: 24px;
    line-height: 1.6;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-links h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    font-size: 0.875rem;
}

.footer-bottom i {
    color: var(--error);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
    }
    
    .hero-subtitle {
        margin: 0 auto 32px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .chat-preview {
        margin: 0 auto;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto 60px;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .register-wrapper {
        grid-template-columns: 1fr;
    }
    
    .register-info {
        text-align: center;
    }
    
    .register-benefits {
        display: inline-block;
        text-align: left;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .navbar .container {
        height: 64px;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
        gap: 32px;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }
    
    .timeline {
        flex-direction: column;
        gap: 24px;
    }
    
    .timeline::before {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .register-form-wrapper {
        padding: 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .btn-lg {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .chat-preview {
        max-width: 100%;
    }
    
    .discount-timeline {
        padding: 24px;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.hidden { display: none !important; }
.visible { display: block !important; }