/* ============================================
   STL AI Solutions - Industrial Precision Design
   Typography: Syne (headlines) + DM Sans (body)
   Palette: Deep slate, Electric blue, Amber accent
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --bg-primary: #0a0f1a;
    --bg-secondary: #0f1629;
    --bg-tertiary: #151d33;
    --bg-card: #1a2440;
    --bg-card-hover: #1f2d4d;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-blue: #3b82f6;
    --accent-blue-light: #60a5fa;
    --accent-blue-dark: #2563eb;
    --accent-amber: #f59e0b;
    --accent-amber-light: #fbbf24;

    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;

    --border-color: rgba(148, 163, 184, 0.1);
    --border-color-light: rgba(148, 163, 184, 0.2);

    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Spacing */
    --container-max: 1280px;
    --section-padding: 120px;
    --section-padding-mobile: 60px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow-blue: 0 0 40px rgba(59, 130, 246, 0.3);
    --shadow-glow-amber: 0 0 40px rgba(245, 158, 11, 0.3);
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

.grid-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
}

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

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

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

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

a {
    color: inherit;
    text-decoration: none;
}

em {
    font-style: normal;
    color: var(--accent-blue-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-dark) 100%);
    color: white;
    box-shadow: var(--shadow-sm), 0 0 20px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 30px rgba(59, 130, 246, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-light);
}

.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--accent-blue);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

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

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

.btn-large .btn-subtext {
    display: block;
    font-size: 12px;
    font-weight: 400;
    opacity: 0.8;
    margin-top: 2px;
}

.btn-nav {
    padding: 10px 20px;
    background: var(--accent-blue);
    color: white;
    border-radius: 6px;
}

.btn-nav:hover {
    background: var(--accent-blue-light);
}

.full-width {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.brand-icon {
    width: 36px;
    height: 36px;
    color: var(--accent-blue);
}

.brand-icon svg {
    width: 100%;
    height: 100%;
}

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

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

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

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

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    max-width: 800px;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.title-line {
    display: block;
    color: var(--text-primary);
}

.title-highlight {
    display: block;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-amber) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    max-width: 600px;
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.stat {
    text-align: left;
}

.stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 48px;
    background: var(--border-color-light);
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-visual {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    height: 80%;
    pointer-events: none;
}

.arch-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.arch {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 300px;
    opacity: 0.9;
    filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.3));
}

.arch path {
    animation: gentleGlow 4s ease-in-out infinite;
}

@keyframes gentleGlow {
    0%, 100% {
        stroke-opacity: 0.8;
    }
    50% {
        stroke-opacity: 1;
    }
}

.arch-nodes .node {
    position: absolute;
    width: 10px;
    height: 10px;
    background: #60a5fa;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
    animation: nodePulse 3s ease-in-out infinite;
}

.node-1 { top: 80%; left: 13%; animation-delay: 0s; }
.node-2 { top: 50%; left: 20%; animation-delay: 0.6s; }
.node-3 { top: 33%; left: 50%; animation-delay: 1.2s; }
.node-4 { top: 50%; left: 80%; animation-delay: 1.8s; }
.node-5 { top: 80%; left: 87%; animation-delay: 2.4s; }

@keyframes nodePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.4);
        opacity: 1;
    }
}

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

/* Section Styling */
section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-subtitle {
    max-width: 600px;
    margin: 16px auto 0;
    font-size: 1.125rem;
}

/* Problem Section */
.problem-section {
    background: var(--bg-secondary);
}

.comparison-box {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: stretch;
    margin-bottom: 64px;
}

.comparison-side {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-base);
}

.comparison-old {
    opacity: 0.8;
}

.comparison-new {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow-blue);
}

.comparison-header {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.comparison-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 12px;
    color: var(--text-muted);
}

.comparison-icon.highlight {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
}

.comparison-header h3 {
    font-size: 1.25rem;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: fit-content;
}

.tag-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-amber);
}

.tag-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.code-block {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 24px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 13px;
    line-height: 1.8;
}

.code-block.highlight {
    border-color: rgba(59, 130, 246, 0.3);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, transparent 100%);
}

.code-keyword {
    color: var(--accent-amber);
}

.code-function {
    color: var(--accent-blue-light);
}

.code-comment {
    color: var(--text-muted);
    font-style: italic;
}

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

.comparison-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.comparison-list li::before {
    content: '';
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
    background-size: contain;
    background-repeat: no-repeat;
}

.comparison-list li.negative::before {
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='10' cy='10' r='8' stroke='%23ef4444' stroke-width='2'/%3E%3Cpath d='M7 7L13 13M13 7L7 13' stroke='%23ef4444' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
}

.comparison-list li.positive::before {
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='10' cy='10' r='8' stroke='%2322c55e' stroke-width='2'/%3E%3Cpath d='M6 10L9 13L14 7' stroke='%2322c55e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.comparison-vs {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-muted);
    padding: 0 16px;
}

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

.problem-stat {
    text-align: center;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.problem-stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-blue);
    line-height: 1;
    margin-bottom: 8px;
}

.problem-stat-label {
    display: block;
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.problem-stat-source {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
}

/* Solutions Section */
.solutions-section {
    background: var(--bg-primary);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.solution-card {
    position: relative;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-base);
}

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

.solution-card.featured {
    border-color: var(--accent-amber);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
}

.solution-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    padding: 4px 12px;
    background: var(--accent-amber);
    color: var(--bg-primary);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
}

.solution-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin-bottom: 20px;
    color: var(--accent-blue);
}

.solution-icon svg {
    width: 32px;
    height: 32px;
}

.solution-card h3 {
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.solution-metrics {
    display: flex;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.solution-metrics span {
    font-size: 12px;
    color: var(--text-muted);
}

.tech-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.tech-stack-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.tech-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tech-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* Pricing Section */
.pricing-section {
    background: var(--bg-secondary);
}

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

.pricing-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-base);
}

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

.pricing-card.featured {
    border-color: var(--accent-blue);
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, transparent 30%);
}

.pricing-card.monthly {
    border-style: dashed;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-dark) 100%);
    color: white;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
    white-space: nowrap;
}

.pricing-header {
    margin-bottom: 20px;
}

.pricing-header h3 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.pricing-tagline {
    font-size: 13px;
    color: var(--text-muted);
}

.pricing-amount {
    margin-bottom: 24px;
}

.price {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.price-type {
    font-size: 14px;
    color: var(--text-muted);
    margin-left: 4px;
}

.pricing-features {
    list-style: none;
    flex: 1;
    margin-bottom: 24px;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

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

.pricing-features li::before {
    content: '';
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    margin-top: 2px;
    background-image: url("data:image/svg+xml,%3Csvg width='16' height='16' viewBox='0 0 16 16' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 8L6 11L13 4' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

.pricing-enterprise {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

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

.enterprise-content p {
    font-size: 14px;
    max-width: 600px;
}

/* Proof Section */
.proof-section {
    background: var(--bg-primary);
}

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

.case-study {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-base);
}

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

.case-header {
    margin-bottom: 24px;
}

.case-company h3 {
    margin-bottom: 4px;
}

.case-industry {
    font-size: 13px;
    color: var(--text-muted);
}

.case-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.case-metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-blue);
    line-height: 1;
    margin-bottom: 4px;
}

.metric-label {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.3;
}

.case-quote {
    font-size: 14px;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    border-left: 3px solid var(--accent-blue);
    padding-left: 16px;
    margin: 0;
}

/* Assessment Section */
.assessment-section {
    background: var(--bg-secondary);
}

.assessment-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 64px;
    background: var(--bg-card);
    border: 1px solid var(--accent-blue);
    border-radius: 24px;
    box-shadow: var(--shadow-glow-blue);
}

.assessment-content h2 {
    margin: 16px 0;
}

.assessment-content > p {
    margin-bottom: 32px;
}

.assessment-benefits {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.benefit-item svg {
    flex-shrink: 0;
    color: var(--success);
}

.assessment-note {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.assessment-preview {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.preview-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.preview-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-card);
}

.preview-dot:nth-child(1) { background: #ef4444; }
.preview-dot:nth-child(2) { background: #f59e0b; }
.preview-dot:nth-child(3) { background: #22c55e; }

.preview-content {
    padding: 24px;
}

.preview-question {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.preview-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}

.preview-option {
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preview-option:hover {
    border-color: var(--accent-blue);
}

.preview-option.active {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-primary);
}

.preview-progress {
    height: 4px;
    background: var(--bg-card);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue) 0%, var(--accent-amber) 100%);
    border-radius: 2px;
    transition: width var(--transition-base);
}

/* FAQ Section */
.faq-section {
    background: var(--bg-primary);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.faq-item {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--accent-blue);
}

.faq-item h3 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.faq-item p {
    font-size: 14px;
    line-height: 1.7;
}

/* Contact Section */
.contact-section {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

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

.contact-info > p {
    margin-bottom: 32px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.contact-method:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.contact-method svg {
    flex-shrink: 0;
    color: var(--accent-blue);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

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

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    cursor: pointer;
}

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

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 64px 0 32px;
}

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

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

.footer-brand .nav-brand {
    margin-bottom: 16px;
}

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

.footer-links h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

.footer-links li {
    margin-bottom: 8px;
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 13px;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--text-primary);
}

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

    .hero-visual {
        display: none;
    }

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

    .comparison-vs {
        padding: 16px 0;
    }

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

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

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

    .assessment-box {
        grid-template-columns: 1fr;
        padding: 40px;
    }

    .assessment-visual {
        order: -1;
    }

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

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

@media (max-width: 768px) {
    :root {
        --section-padding: var(--section-padding-mobile);
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 16px;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu .btn-nav {
        margin-top: 12px;
        text-align: center;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
    }

    .stat-divider {
        display: none;
    }

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

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

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

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

    .pricing-enterprise {
        flex-direction: column;
        text-align: center;
    }

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

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

    .assessment-box {
        padding: 24px;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}