:root {
    /* Color Palette - Minimalist & High Contrast */
    --bg-color: #ffffff;
    --surface-color: #fafafa;
    --text-main: #111111;
    --text-muted: #666666;
    --border-color: #eaeaea;
    
    /* Brand Colors */
    --accent-color: #111111;
    --accent-hover: #333333;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", sans-serif;
    
    /* Layout */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --container-width: 1040px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

/* Typography Utilities */
h1, h2, h3 {
    letter-spacing: -0.03em;
    font-weight: 700;
    line-height: 1.2;
}

.eyebrow {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.eyebrow-light {
    color: rgba(255, 255, 255, 0.6);
}

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

.section {
    padding: 120px 0;
}

.center {
    text-align: center;
}

/* Header */
.lp-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.lp-brand {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo-img {
    height: 24px;
    width: auto;
    object-fit: contain;
    display: block;
}

.lp-nav {
    display: none;
}

@media (min-width: 768px) {
    .lp-nav {
        display: flex;
        gap: 32px;
        font-size: 0.9rem;
        color: var(--text-muted);
        font-weight: 500;
    }
    
    .lp-nav a:hover {
        color: var(--text-main);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
    border: 1px solid var(--accent-color);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--surface-color);
    border-color: #d1d1d1;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 0 24px;
}

.hero h1 {
    font-size: clamp(40px, 6vw, 72px);
    margin-bottom: 24px;
}

.hero-lead {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Mock UI */
.hero-visual {
    max-width: 900px;
    margin: 80px auto 0;
    padding: 0 24px;
}

.mock-window {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.mock-header {
    display: flex;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-color);
}

.mock-dots {
    display: flex;
    gap: 8px;
    margin-right: 24px;
}

.mock-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #e0e0e0;
}

.mock-dots span:nth-child(1) { background: #FF5F56; }
.mock-dots span:nth-child(2) { background: #FFBD2E; }
.mock-dots span:nth-child(3) { background: #27C93F; }

.mock-search-bar {
    flex: 1;
    max-width: 300px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.mock-body {
    display: flex;
    height: 340px;
}

.mock-sidebar {
    width: 200px;
    border-right: 1px solid var(--border-color);
    padding: 16px 8px;
    background: var(--surface-color);
    display: none;
}

@media (min-width: 640px) {
    .mock-sidebar { display: block; }
}

.mock-nav-item {
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-muted);
    border-radius: 4px;
    margin-bottom: 4px;
}

.mock-nav-item.active {
    background: #ebebeb;
    color: var(--text-main);
    font-weight: 500;
}

.mock-content {
    flex: 1;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: #ffffff;
}

.mock-card {
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.mock-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 8px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 8px;
}

.mock-card p {
    font-size: 14px;
    font-weight: 500;
}

/* Sections */
.section-head {
    margin-bottom: 64px;
}

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

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.step-card {
    padding: 32px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: background 0.3s ease;
}

.step-card:hover {
    background: #ffffff;
    box-shadow: var(--shadow-md);
}

.step-index {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 16px;
    font-family: monospace;
}

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

.step-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 48px 32px;
}

.feature-card {
    display: flex;
    flex-direction: column;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-main);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Dark Panel */
.panel-dark {
    background: #111111;
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: clamp(40px, 8vw, 80px);
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.panel-dark h2 {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 24px;
}

.panel-dark p {
    font-size: 1.1rem;
    color: #a0a0a0;
    margin-bottom: 40px;
    max-width: 500px;
}

.panel-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel-list span {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    font-weight: 500;
}

.panel-list i {
    color: #ffffff;
    background: #333333;
    padding: 6px;
    border-radius: 50%;
    font-size: 0.75rem;
}

/* CTA Section */
.cta {
    padding: 120px 0;
}

.cta h2 {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 16px;
}

.cta p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

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

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    font-weight: 700;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-links {
    display: flex;
    gap: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

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

.copyright {
    font-size: 0.85rem;
    color: #999999;
    margin-top: 32px;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.15s;
}