/* ========================================
   Sorcha.dev - Modern Data Flow Platform
   ======================================== */

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #14b8a6;
    --accent-color: #f59e0b;

    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;

    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-dark: #111827;

    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

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

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    color: var(--primary-dark);
}

/* ===== Layout ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

/* ===== Hero Section ===== */
.hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(135deg, #ffd89b 0%, #19547b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ===== Sections ===== */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ===== Feature Grids ===== */
.features-grid,
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card,
.use-case-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.feature-icon,
.use-case-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3,
.use-case-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p,
.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.link-arrow {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    transition: transform var(--transition-fast);
}

.link-arrow:hover {
    transform: translateX(4px);
}

/* ===== Data Protection Section ===== */
.data-protection {
    background-color: var(--bg-secondary);
}

.content-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.content-text h2 {
    margin-bottom: var(--spacing-md);
}

.lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.protection-features {
    margin: var(--spacing-xl) 0;
}

.protection-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.check-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.protection-item h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.protection-item p {
    margin: 0;
    font-size: 0.9375rem;
}

/* ===== Code Blocks ===== */
.code-block {
    background-color: var(--bg-dark);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-header {
    background-color: #1e293b;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #334155;
}

.code-title {
    color: #cbd5e1;
    font-size: 0.875rem;
    font-weight: 500;
}

.code-block pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
}

.code-block code {
    background: none;
    color: #e2e8f0;
    font-size: 0.875rem;
    line-height: 1.7;
    padding: 0;
}

/* ===== Page Header ===== */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ===== Feature Detail Pages ===== */
.feature-detail {
    padding: var(--spacing-2xl) 0;
}

.feature-detail.alt-bg {
    background-color: var(--bg-secondary);
}

.feature-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.feature-icon-large {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.algo-grid,
.designer-grid,
.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.algo-card,
.designer-card,
.arch-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.algo-card h4,
.designer-card h4,
.arch-card h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.algo-card ul {
    list-style-position: inside;
    color: var(--text-secondary);
}

.features-list {
    margin-top: var(--spacing-lg);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature-icon-sm {
    flex-shrink: 0;
    font-size: 1.5rem;
}

/* ===== Use Case Detail Pages ===== */
.use-case-detail {
    padding: var(--spacing-2xl) 0;
}

.use-case-detail.alt-bg {
    background-color: var(--bg-secondary);
}

.use-case-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto var(--spacing-2xl);
}

.use-case-icon-large {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.challenge-solution {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.challenge,
.solution {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.challenge h3 {
    color: var(--accent-color);
}

.solution h3 {
    color: var(--secondary-color);
}

.challenge ul,
.solution ul {
    list-style-position: inside;
    color: var(--text-secondary);
}

.blueprint-example {
    margin: var(--spacing-2xl) 0;
}

.blueprint-example h3 {
    margin-bottom: var(--spacing-md);
}

.benefits {
    margin-top: var(--spacing-2xl);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.benefit-item {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.benefit-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.25rem;
}

/* ===== Documentation Layout ===== */
.docs-section {
    padding: var(--spacing-2xl) 0;
}

.docs-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-2xl);
}

.docs-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.docs-nav h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.docs-nav ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.docs-nav li {
    margin-bottom: 0.5rem;
}

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

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

.docs-content {
    max-width: 800px;
}

.doc-article {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--border-color);
}

.doc-article:last-child {
    border-bottom: none;
}

.doc-article h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.doc-article h3 {
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.doc-article ul,
.doc-article ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.doc-article li {
    margin-bottom: 0.5rem;
}

.docs-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
}

.docs-table th,
.docs-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.docs-table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.docs-table td {
    color: var(--text-secondary);
}

.api-methods {
    margin-top: var(--spacing-md);
}

.api-method {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.api-method code {
    background-color: var(--bg-primary);
    padding: 0.25rem 0.5rem;
    font-size: 0.9375rem;
    color: var(--primary-dark);
}

.api-method p {
    margin-top: 0.5rem;
    margin-bottom: 0;
    font-size: 0.9375rem;
}

.next-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.next-step-card {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 0.75rem;
    text-align: center;
}

.next-step-card h3 {
    margin-bottom: var(--spacing-sm);
}

.next-step-card p {
    margin-bottom: var(--spacing-md);
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

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

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.cta-section .btn-secondary {
    border-color: white;
    color: white;
}

.cta-section .btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-dark);
    color: #cbd5e1;
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.footer-section p {
    color: #94a3b8;
    font-size: 0.9375rem;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e1;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 0.875rem;
    margin: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .content-split,
    .challenge-solution {
        grid-template-columns: 1fr;
    }

    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .docs-layout {
        grid-template-columns: 1fr;
    }

    .docs-sidebar {
        position: static;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

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

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }

/* ===== Accessibility ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== Print Styles ===== */
@media print {
    .navbar,
    .footer,
    .cta-section,
    .mobile-menu-toggle {
        display: none;
    }

    body {
        color: black;
        background: white;
    }
}