/* ================================
   CSS Variables & Base Styles
   ================================ */

:root {
    /* Colors - Calm, serious, professional */
    --color-bg: #fafafa;
    --color-bg-alt: #f4f4f5;
    --color-bg-dark: #18181b;
    --color-bg-dark-alt: #27272a;
    
    --color-text: #18181b;
    --color-text-secondary: #52525b;
    --color-text-tertiary: #a1a1aa;
    --color-text-inverse: #fafafa;
    
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-subtle: #eff6ff;
    
    --color-border: #e4e4e7;
    --color-border-dark: #3f3f46;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ================================
   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-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

p {
    margin-bottom: 1em;
}

p:last-child {
    margin-bottom: 0;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ================================
   Layout
   ================================ */

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

section {
    padding: var(--space-5xl) 0;
}

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 250, 250, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-dark);
    color: var(--color-text-inverse) !important;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-bg-dark-alt);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        padding: var(--space-lg);
        border-bottom: 1px solid var(--color-border);
        gap: var(--space-lg);
    }
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-bg-dark);
    color: var(--color-text-inverse);
    border: 1px solid var(--color-bg-dark);
}

.btn-primary:hover {
    background: var(--color-bg-dark-alt);
    border-color: var(--color-bg-dark-alt);
}

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

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text-tertiary);
}

.btn-full {
    width: 100%;
}

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

.hero {
    padding-top: calc(var(--space-5xl) + 60px);
    padding-bottom: var(--space-4xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    min-height: 90vh;
}

.hero > .container {
    grid-column: 1;
}

.hero-visual {
    grid-column: 2;
    padding-right: var(--space-3xl);
}

.hero-content {
    max-width: 600px;
}

.hero-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--space-xl);
    color: var(--color-text);
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Simulation Preview */
.simulation-preview {
    position: relative;
}

.sim-window {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.sim-header {
    display: flex;
    gap: 6px;
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.sim-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
}

.sim-content {
    display: flex;
    min-height: 300px;
}

.sim-sidebar {
    width: 60px;
    background: var(--color-bg-alt);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    border-right: 1px solid var(--color-border);
}

.sim-nav-item {
    height: 32px;
    background: var(--color-border);
    border-radius: var(--radius-sm);
    opacity: 0.5;
}

.sim-nav-item.active {
    opacity: 1;
    background: var(--color-text-tertiary);
}

.sim-main {
    flex: 1;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.sim-card {
    height: 60px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.sim-card.short {
    width: 70%;
}

.sim-annotation {
    position: absolute;
    bottom: -20px;
    right: 20px;
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: #fef3c7;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 280px;
}

.annotation-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: #f59e0b;
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.annotation-text {
    font-size: 0.875rem;
    color: #92400e;
    line-height: 1.4;
}

/* Hero Carousel */
.hero-carousel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.carousel-panels {
    position: relative;
    min-height: 420px;
}

.carousel-panel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.carousel-panel.active {
    opacity: 1;
    visibility: visible;
}

.carousel-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 15px;
}

.carousel-nav {
    display: flex;
    gap: 8px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: var(--color-border);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-dot.active {
    background: var(--color-text);
    transform: scale(1.2);
}

.carousel-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
}

/* Mockup Window */
.mockup-window {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    position: relative;
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #fafafa;
    border-bottom: 1px solid var(--color-border);
}

.mockup-dots {
    display: flex;
    gap: 6px;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #e5e5e5;
}

.mockup-dots span:first-child { background: #ff5f57; }
.mockup-dots span:nth-child(2) { background: #febc2e; }
.mockup-dots span:last-child { background: #28c840; }

.mockup-title {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.mockup-content {
    min-height: 280px;
}

/* Feedback Overlay */
.feedback-overlay {
    position: absolute;
    border: 2px dashed #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 4px;
    pointer-events: none;
}

.feedback-comment {
    position: absolute;
    bottom: -25px;
    right: 20px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
    background: #fef3c7;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 280px;
}

.comment-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: #f59e0b;
    color: white;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 600;
    flex-shrink: 0;
}

.comment-text {
    font-size: 0.8rem;
    color: #92400e;
    line-height: 1.4;
}

/* Panel 1: Fintech */
.mockup-fintech {
    display: flex;
}

.fintech-sidebar {
    width: 56px;
    background: #1e293b;
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.fintech-logo {
    width: 32px;
    height: 32px;
    background: #3b82f6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
}

.fintech-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
}

.fintech-nav .nav-item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: #64748b;
    cursor: pointer;
}

.fintech-nav .nav-item.active {
    background: #334155;
    color: white;
}

.fintech-main {
    flex: 1;
    padding: 20px 24px;
    background: #f8fafc;
}

.fintech-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.fintech-header-row h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
}

.badge {
    font-size: 0.65rem;
    padding: 4px 8px;
    background: #dbeafe;
    color: #1d4ed8;
    border-radius: 4px;
    font-weight: 500;
}

.fintech-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-group label {
    display: block;
    font-size: 0.7rem;
    color: #64748b;
    margin-bottom: 4px;
    font-weight: 500;
}

.form-select, .form-input {
    padding: 10px 12px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.75rem;
    color: #1e293b;
}

/* Tester annotations - these are drawn BY the tester, not part of the app */
.amount-value {
    position: relative;
    display: inline-block;
}

.amount-value .tester-selection {
    position: absolute;
    top: -4px;
    left: -6px;
    right: -6px;
    bottom: -4px;
    border: 2px dashed #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 4px;
    pointer-events: none;
}

.fintech-btn {
    margin-top: 8px;
    padding: 10px 16px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
}

/* Panel 2: Before/After Split */
.mockup-split {
    display: flex;
    height: 340px;
    background: var(--color-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.split-before, .split-after {
    flex: 1;
    position: relative;
    padding: 20px;
}

.split-before {
    background: #fef2f2;
}

.split-after {
    background: #f0fdf4;
}

.split-divider {
    width: 2px;
    background: var(--color-border);
}

.split-label {
    position: absolute;
    bottom: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.split-label-before {
    left: 12px;
    color: #dc2626;
}

.split-label-after {
    right: 12px;
    color: #16a34a;
}

.chaos-board {
    position: relative;
    height: 100%;
}

.sticky {
    position: absolute;
    padding: 8px 10px;
    font-size: 0.65rem;
    font-weight: 500;
    border-radius: 2px;
    box-shadow: 1px 1px 3px rgba(0,0,0,0.1);
    color: #374151;
}

.chaos-arrow {
    position: absolute;
    font-size: 1.5rem;
    color: #9ca3af;
}

.chaos-arrow.crossed {
    text-decoration: line-through;
    color: #dc2626;
}

.chaos-scribble {
    position: absolute;
    font-size: 1.2rem;
    color: #dc2626;
    font-weight: bold;
}

.clarity-board {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 12px;
}

.clarity-window {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    width: 90%;
}

.clarity-header {
    display: flex;
    gap: 4px;
    padding: 8px 10px;
    background: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.clarity-header span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #d1d5db;
}

.clarity-content {
    padding: 12px;
}

.clarity-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: 0.7rem;
    color: #374151;
}

.clarity-row.resolved {
    color: #15803d;
}

.clarity-badge {
    font-size: 0.65rem;
    padding: 4px 10px;
    background: #dcfce7;
    color: #15803d;
    border-radius: 12px;
    font-weight: 500;
}

/* Panel 3: E-commerce */
.mockup-ecommerce {
    display: flex;
    flex-direction: column;
}

.ecom-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: #1f2937;
    color: white;
}

.ecom-logo {
    font-size: 0.85rem;
    font-weight: 700;
}

.ecom-nav-items {
    display: flex;
    gap: 16px;
    font-size: 0.7rem;
}

.ecom-nav-items span {
    opacity: 0.7;
}

.ecom-nav-items span.active {
    opacity: 1;
}

.ecom-body {
    display: flex;
    flex: 1;
}

.ecom-sidebar {
    width: 120px;
    background: #f9fafb;
    padding: 12px;
    border-right: 1px solid #e5e7eb;
}

.ecom-menu-item {
    padding: 8px 10px;
    font-size: 0.7rem;
    color: #6b7280;
    border-radius: 4px;
    margin-bottom: 4px;
}

.ecom-menu-item.active {
    background: #e0e7ff;
    color: #4338ca;
    font-weight: 500;
}

.ecom-main {
    flex: 1;
    padding: 16px 20px;
}

.ecom-main h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 16px 0;
}

.ecom-form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    padding: 8px;
    border-radius: 4px;
}

.ecom-form-row.highlighted {
    background: #fffbeb;
    border: 1px dashed #f59e0b;
}

.ecom-field label {
    display: block;
    font-size: 0.65rem;
    color: #6b7280;
    margin-bottom: 4px;
}

.ecom-input {
    padding: 6px 10px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    font-size: 0.7rem;
    color: #1f2937;
    min-width: 80px;
}

/* Panel 4: Pitch */
.mockup-pitch {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    padding: 20px;
    position: relative;
}

.pitch-app {
    width: 100%;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
}

.pitch-app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: #111827;
    color: white;
}

.pitch-app-logo {
    font-weight: 600;
    font-size: 0.8rem;
}

.pitch-app-nav {
    display: flex;
    gap: 16px;
    font-size: 0.7rem;
    color: #9ca3af;
}

.pitch-app-nav span.active {
    color: white;
}

.pitch-app-body {
    display: flex;
    min-height: 200px;
}

.pitch-sidebar {
    width: 100px;
    background: #f9fafb;
    border-right: 1px solid #e5e7eb;
    padding: 12px 0;
}

.pitch-menu-item {
    padding: 8px 14px;
    font-size: 0.65rem;
    color: #6b7280;
    cursor: pointer;
}

.pitch-menu-item.active {
    background: #eef2ff;
    color: #4f46e5;
    border-right: 2px solid #4f46e5;
}

.pitch-main {
    flex: 1;
    padding: 16px;
}

.pitch-stat-row {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.pitch-stat {
    flex: 1;
    background: #f9fafb;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.6rem;
    color: #6b7280;
    margin-bottom: 4px;
}

.stat-value {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    color: #111827;
}

.stat-trend {
    font-size: 0.6rem;
    font-weight: 500;
}

.stat-trend.up {
    color: #10b981;
}

.stat-trend.down {
    color: #10b981;
}

.pitch-chart {
    background: #f9fafb;
    border-radius: 6px;
    padding: 16px;
    height: 80px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 100%;
}

.chart-bars .bar {
    flex: 1;
    background: linear-gradient(180deg, #6366f1 0%, #4f46e5 100%);
    border-radius: 3px 3px 0 0;
}

.pitch-play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pitch-play-btn {
    width: 56px;
    height: 56px;
    background: #6366f1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
    cursor: pointer;
}

.pitch-play-btn svg {
    margin-left: 3px;
}

.pitch-reactions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.reaction {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.pitch-caption {
    margin-top: 12px;
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.7);
}

.pitch-quote {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.pitch-quote .comment-marker {
    background: #f59e0b;
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .hero > .container {
        grid-column: 1;
    }
    
    .hero-visual {
        grid-column: 1;
        padding: 0 var(--container-padding);
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-carousel {
        min-height: 380px;
    }
    
    .mockup-split {
        height: 300px;
    }
}

@media (max-width: 640px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
}

/* ================================
   Problem Section
   ================================ */

.problem {
    background: var(--color-bg-dark);
    color: var(--color-text-inverse);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.problem-intro h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    position: sticky;
    top: 120px;
}

.problem-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.problem-item {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
}

.problem-marker {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

.problem-item p {
    font-size: 1.125rem;
    color: #a1a1aa;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .problem-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .problem-intro h2 {
        position: static;
    }
}

/* ================================
   Section Headers
   ================================ */

.section-header {
    max-width: 700px;
    margin-bottom: var(--space-4xl);
}

.section-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.section-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-lg);
}

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

/* ================================
   Approach Section
   ================================ */

.approach {
    background: var(--color-bg-alt);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-4xl);
}

.approach-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.approach-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.approach-card h3 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.approach-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

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

@media (max-width: 640px) {
    .approach-grid {
        grid-template-columns: 1fr;
    }
}

/* Distinction */
.approach-distinction {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.distinction-header {
    margin-bottom: var(--space-xl);
}

.distinction-header h3 {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.distinction-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.distinction-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.distinction-x {
    color: var(--color-text-tertiary);
    font-weight: 500;
}

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

@media (max-width: 480px) {
    .distinction-items {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Services Section
   ================================ */

.service-primary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    padding: var(--space-3xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-3xl);
}

.service-primary-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.service-primary-content > p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.service-features li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--color-text-tertiary);
    border-radius: 50%;
}

.visual-scenarios {
    display: flex;
    gap: var(--space-md);
}

.scenario-card {
    flex: 1;
    padding: var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.scenario-card.active {
    opacity: 1;
    border-color: #0095FF;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    box-shadow: 0 4px 12px rgba(0, 149, 255, 0.15);
}

.scenario-card:nth-child(2) {
    border-color: #e2e8f0;
}

.scenario-card:nth-child(2):hover {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    opacity: 1;
}

.scenario-card:nth-child(3) {
    border-color: #e2e8f0;
}

.scenario-card:nth-child(3):hover {
    border-color: #8b5cf6;
    background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%);
    opacity: 1;
}

.scenario-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    display: block;
}

.scenario-card.active .scenario-label {
    color: #0095FF;
    font-weight: 600;
}

.scenario-preview {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.scenario-block {
    height: 16px;
    background: var(--color-bg-alt);
    border-radius: 2px;
}

.scenario-card.active .scenario-block {
    background: #0095FF;
    opacity: 0.3;
}

.scenario-card.active .scenario-block:first-child {
    opacity: 0.5;
}

.scenario-block.short {
    width: 60%;
}

@media (max-width: 768px) {
    .service-primary {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.service-card {
    padding: var(--space-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.service-header {
    margin-bottom: var(--space-md);
}

.service-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    display: block;
    margin-bottom: var(--space-xs);
}

.service-card h4 {
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    font-weight: 600;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.service-purpose {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    font-style: italic;
}

@media (max-width: 640px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Process Section
   ================================ */

.process {
    background: var(--color-bg-alt);
}

.process-timeline {
    max-width: 700px;
    margin: 0 auto;
}

.process-step {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--space-xl);
}

.step-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.step-line {
    flex: 1;
    width: 2px;
    background: var(--color-border);
    margin: var(--space-md) 0;
}

.step-content {
    padding-bottom: var(--space-3xl);
}

.step-content h4 {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.step-content p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.step-output {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.process-step:last-child .step-content {
    padding-bottom: 0;
}

@media (max-width: 640px) {
    .process-step {
        grid-template-columns: 50px 1fr;
        gap: var(--space-md);
    }
}

/* ================================
   Triggers Section
   ================================ */

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

.triggers-content h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.triggers-intro {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3xl);
}

.triggers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.trigger-quote {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-style: italic;
    color: var(--color-text-secondary);
    padding: var(--space-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-border);
}

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

@media (max-width: 480px) {
    .triggers-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Clients Section
   ================================ */

.clients {
    background: var(--color-bg-alt);
    padding: var(--space-4xl) 0;
}

.clients .section-header {
    margin-bottom: var(--space-3xl);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.client-type {
    padding: var(--space-xl);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.client-type h3 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.client-type p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

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

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

/* ================================
   Data Handling Section
   ================================ */

.data-handling {
    background: var(--color-bg-dark);
    color: var(--color-text-inverse);
}

.data-content {
    text-align: center;
}

.data-header {
    margin-bottom: var(--space-3xl);
}

.data-header h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
}

.data-modes {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.data-mode {
    padding: var(--space-xl);
    background: var(--color-bg-dark-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-dark);
}

.data-mode h4 {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.data-mode p {
    font-size: 0.875rem;
    color: #a1a1aa;
    line-height: 1.5;
}

.data-principles {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: #71717a;
}

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

/* ================================
   Contact Section
   ================================ */

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.contact-text h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-lg);
}

.contact-text > p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.contact-note {
    font-size: 0.9375rem;
    color: var(--color-text-tertiary);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-lg);
}

.contact-form {
    background: var(--color-bg-alt);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group:last-of-type {
    margin-bottom: var(--space-xl);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: inherit;
    font-size: 0.9375rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

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

.footer {
    background: var(--color-bg-alt);
    padding: var(--space-3xl) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-4xl);
    align-items: start;
}

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-legal {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* ================================
   Utility Classes
   ================================ */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}