/* ==========================================
   AuditOS Landing Page - Complete Stylesheet
   Design: Dark mode, corporate-tech elegance
   ========================================== */

/* CSS Custom Properties */
:root {
    /* Colors */
    --primary: #0F172A;
    --accent: #3B82F6;
    --accent-light: #60A5FA;
    --accent-dark: #2563EB;
    --surface: #1E293B;
    --surface-alt: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --success: #22C55E;
    --white: #FFFFFF;
    --error: #EF4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-max: 1280px;
    --container-padding: 0 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: clamp(36px, 5vw, 56px);
}

h2 {
    font-size: clamp(28px, 4vw, 40px);
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 18px;
}

p {
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--accent-light);
}

/* Section titles */
.section-title {
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
    font-size: 18px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 16px;
    padding: 12px 24px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    transform: scale(1.03);
}

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

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

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--surface-alt);
}

.btn-secondary:hover {
    background: var(--surface-alt);
    border-color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent);
}

.btn-ghost:hover {
    background: var(--accent);
    color: var(--white);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-full {
    width: 100%;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

.delay-4 {
    transition-delay: 0.4s;
}

.delay-5 {
    transition-delay: 0.5s;
}

.delay-6 {
    transition-delay: 0.6s;
}

/* ==========================================
   Cookie Banner
   ========================================== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(12px);
    padding: 20px;
    z-index: 1000;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    border-top: 1px solid var(--surface-alt);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cookie-icon {
    font-size: 32px;
}

.cookie-content p {
    flex: 1;
    min-width: 300px;
    margin: 0;
    font-size: 14px;
}

.cookie-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Cookie Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 28px;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

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

.modal-content h3 {
    margin-bottom: 24px;
}

.cookie-option {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--surface-alt);
}

.cookie-option:last-of-type {
    border-bottom: none;
}

.cookie-option label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.cookie-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
}

.cookie-label {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge {
    font-size: 11px;
    font-weight: 500;
    background: var(--accent);
    color: var(--white);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.cookie-desc {
    margin-top: 8px;
    margin-left: 32px;
    font-size: 14px;
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    z-index: 100;
    padding: 16px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-lg);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo span {
    color: var(--accent);
}

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

.nav-menu {
    display: flex;
    gap: 32px;
    list-style: none;
}

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

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

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

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

.nav-cta {
    margin-left: 16px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    padding: 160px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--surface) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

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

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

.hero-title .highlight {
    color: var(--accent);
    display: block;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

.hero-ctas {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.badge-icon {
    color: var(--success);
    font-weight: 700;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
}

.visual-container {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--surface-alt);
    box-shadow: var(--shadow-xl);
}

.flow-animation {
    display: flex;
    align-items: center;
    gap: 24px;
}

.flow-docs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.doc {
    width: 60px;
    height: 50px;
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    border: 1px solid var(--accent);
    animation: docPulse 2s ease-in-out infinite;
}

.doc-1 {
    animation-delay: 0s;
}

.doc-2 {
    animation-delay: 0.2s;
}

.doc-3 {
    animation-delay: 0.4s;
}

@keyframes docPulse {

    0%,
    100% {
        opacity: 0.5;
        transform: translateX(0);
    }

    50% {
        opacity: 1;
        transform: translateX(5px);
    }
}

.flow-arrow {
    color: var(--accent);
    width: 32px;
    animation: arrowMove 1.5s ease-in-out infinite;
}

@keyframes arrowMove {

    0%,
    100% {
        transform: translateX(0);
        opacity: 0.5;
    }

    50% {
        transform: translateX(5px);
        opacity: 1;
    }
}

.system-core {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-radius: var(--radius-md);
    animation: corePulse 2s ease-in-out infinite;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
}

@keyframes corePulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 0 50px rgba(59, 130, 246, 0.6);
    }
}

.report {
    width: 60px;
    height: 80px;
    background: var(--success);
    border-radius: var(--radius-sm);
    animation: reportGlow 2s ease-in-out infinite;
}

@keyframes reportGlow {

    0%,
    100% {
        opacity: 0.7;
    }

    50% {
        opacity: 1;
        box-shadow: 0 0 20px rgba(34, 197, 94, 0.5);
    }
}

/* ==========================================
   Problem Section
   ========================================== */
.problem {
    padding: var(--section-padding);
    background: var(--primary);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.problem-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--surface-alt);
    transition: all var(--transition-normal);
}

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

.problem-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.problem-card h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.problem-statement {
    text-align: center;
    font-size: 20px;
    font-style: italic;
    color: var(--text-primary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   Solution Section
   ========================================== */
.solution {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--primary) 0%, var(--surface) 100%);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 60px auto;
}

.timeline-line {
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--success));
}

.phase-card {
    position: relative;
    margin-bottom: 48px;
    padding-left: 80px;
}

.phase-card:last-child {
    margin-bottom: 0;
}

.phase-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    z-index: 1;
}

.phase-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--surface-alt);
}

.phase-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.phase-header h3 {
    color: var(--text-primary);
}

.phase-flow {
    background: var(--accent);
    color: var(--white);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}

.phase-content>p {
    margin-bottom: 16px;
}

.phase-output {
    background: var(--primary);
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    border-left: 3px solid var(--success);
}

.phase-output strong {
    color: var(--success);
}

.phase-features {
    list-style: none;
    display: grid;
    gap: 8px;
}

.phase-features li {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Control Banner */
.control-banner {
    background: var(--accent);
    border-radius: var(--radius-lg);
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    max-width: 900px;
    margin: 48px auto 0;
}

.banner-icon {
    font-size: 32px;
}

.control-banner p {
    color: var(--white);
    font-weight: 500;
    margin: 0;
}

/* ==========================================
   Results Section
   ========================================== */
.results {
    padding: var(--section-padding);
    background: var(--surface);
}

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

.case-card {
    background: var(--primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--surface-alt);
    transition: all var(--transition-normal);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-label {
    display: inline-block;
    background: var(--accent);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.case-header h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
}

.case-profile {
    font-size: 14px;
    margin-bottom: 24px;
}

.case-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.case-before,
.case-after {
    padding: 16px;
    border-radius: var(--radius-md);
}

.case-before {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.case-after {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.case-before h4 {
    color: var(--error);
}

.case-after h4 {
    color: var(--success);
}

.case-comparison ul {
    list-style: none;
    margin-top: 12px;
}

.case-comparison li {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.case-challenge,
.case-results,
.case-transformation {
    margin-bottom: 20px;
}

.case-challenge h4,
.case-results h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

.case-results ul {
    list-style: none;
}

.case-results li {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 6px;
}

.case-transformation p {
    font-size: 14px;
    margin-bottom: 8px;
}

.case-quote {
    font-style: italic;
    color: var(--text-secondary);
    padding: 16px;
    background: var(--surface);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent);
    font-size: 14px;
    margin: 0;
}

/* Value Banner */
.value-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--surface) 100%);
    border-radius: var(--radius-lg);
    padding: 48px;
    margin-top: 60px;
    text-align: center;
    border: 1px solid var(--accent);
}

.value-banner h3 {
    color: var(--text-primary);
    margin-bottom: 32px;
    font-size: 28px;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

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

.value-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 12px;
}

.value-item p {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

/* Tech Banner */
.tech-banner {
    background: var(--accent);
    border-radius: var(--radius-lg);
    padding: 24px 32px;
    margin-top: 48px;
    text-align: center;
}

.tech-banner p {
    color: var(--white);
    font-size: 18px;
    margin: 0;
}

/* Label Note */
.label-note {
    font-weight: 400;
    color: var(--accent);
    font-size: 12px;
}

@media (max-width: 768px) {
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .value-banner {
        padding: 32px 24px;
    }
}

/* ==========================================
   Personalization Section
   ========================================== */
.personalization {
    padding: var(--section-padding);
    background: var(--primary);
}

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

.personalization-text .section-title {
    text-align: left;
}

.personalization-text .lead {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.personalization-list {
    list-style: none;
    margin: 20px 0;
}

.personalization-list li {
    color: var(--accent);
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
}

.personalization-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.personalization-promise {
    font-size: 16px;
    margin: 24px 0;
}

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

/* Comparison */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.comparison-item {
    padding: 24px;
    border-radius: var(--radius-lg);
}

.comparison-item.generic {
    background: var(--surface);
    border: 1px solid var(--surface-alt);
}

.comparison-item.custom {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(34, 197, 94, 0.1) 100%);
    border: 1px solid var(--accent);
}

.comparison-item h4 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.comparison-item ul {
    list-style: none;
}

.comparison-item li {
    font-size: 14px;
    margin-bottom: 10px;
    padding-left: 24px;
    position: relative;
}

.comparison-item li.negative::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: var(--error);
}

.comparison-item li.positive::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
}

/* ==========================================
   Demos Section
   ========================================== */
.demos {
    padding: var(--section-padding);
    background: var(--surface);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.demo-card {
    background: var(--primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--surface-alt);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.demo-thumbnail {
    position: relative;
    height: 160px;
    background: linear-gradient(135deg, var(--surface) 0%, var(--surface-alt) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button {
    width: 64px;
    height: 64px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-fast);
}

.play-button svg {
    width: 28px;
    height: 28px;
    margin-left: 4px;
}

.demo-card:hover .play-button {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

.demo-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0, 0, 0, 0.7);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

.demo-info {
    padding: 20px;
}

.demo-info h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.demo-info p {
    font-size: 14px;
}

/* ==========================================
   Technical Section
   ========================================== */
.technical {
    padding: var(--section-padding);
    background: var(--primary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.tech-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--surface-alt);
    transition: all var(--transition-normal);
}

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

.tech-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.tech-card h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 18px;
}

.tech-card p {
    font-size: 14px;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--surface) 0%, var(--primary) 100%);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    text-align: center;
    margin-bottom: 48px;
}

.contact-info .section-title {
    margin-bottom: 16px;
}

.contact-subtitle {
    font-size: 18px;
}

.contact-form {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--surface-alt);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--primary);
    border: 1px solid var(--surface-alt);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 16px;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--surface);
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.checkbox-label,
.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
}

.checkbox-label input,
.radio-label input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.form-privacy {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: 60px 0 30px;
    background: var(--primary);
    border-top: 1px solid var(--surface-alt);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
    display: inline-block;
}

.footer-brand p {
    font-size: 14px;
    max-width: 280px;
}

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

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.footer-column li {
    margin-bottom: 10px;
}

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

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--surface-alt);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
}

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

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-ctas {
        justify-content: center;
    }

    .trust-badges {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

    .problem-grid {
        grid-template-columns: 1fr;
    }

    .case-studies {
        grid-template-columns: 1fr;
    }

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

    .personalization-text .section-title {
        text-align: center;
    }

    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-brand {
        margin-bottom: 32px;
    }

    .footer-brand p {
        max-width: none;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--surface);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        padding: 40px;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }

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

    .nav-toggle {
        display: flex;
        z-index: 101;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .nav-cta {
        display: none;
    }

    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-ctas {
        flex-direction: column;
    }

    .hero-ctas .btn {
        width: 100%;
    }

    .trust-badges {
        flex-direction: column;
        align-items: center;
    }

    .timeline-line {
        left: 20px;
    }

    .phase-card {
        padding-left: 60px;
    }

    .phase-number {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .phase-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .control-banner {
        flex-direction: column;
        text-align: center;
    }

    .case-comparison {
        grid-template-columns: 1fr;
    }

    .comparison {
        grid-template-columns: 1fr;
    }

    .demo-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 24px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
    }

    .cookie-buttons {
        justify-content: center;
        width: 100%;
    }

    .cookie-buttons .btn {
        flex: 1;
    }
}

/* Small mobile */
@media (max-width: 480px) {

    .checkbox-group,
    .radio-group {
        flex-direction: column;
        gap: 12px;
    }

    .cookie-buttons {
        flex-direction: column;
    }

    .cookie-buttons .btn {
        width: 100%;
    }
}