/* simple_* Documentation Stylesheet */
/* Design inspired by Eiffel Tower + Circuit Board Logo */
/* Supports light and dark mode with tech-forward aesthetic */

:root {
    /* Light Mode - Clean tech look */
    --primary-color: #1e3a5f;          /* Deep blue - like the tower structure */
    --secondary-color: #00d4aa;        /* Electric teal - circuit glow */
    --accent-color: #ff6b6b;           /* Signal red */
    --background-color: #f0f4f8;       /* Soft tech gray */
    --surface-color: #ffffff;
    --code-background: #1a1a2e;        /* Dark terminal */
    --text-color: #2d3748;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --success-color: #00d4aa;
    --warning-color: #fbbf24;
    --header-gradient-start: #0f172a;  /* Deep night sky */
    --header-gradient-end: #1e3a5f;    /* Tower blue */
    --table-hover: #f7fafc;
    --feature-bg: #f7fafc;
    --api-bg: #f0f4f8;
    --require-bg: #fef3c7;
    --require-border: #f59e0b;
    --ensure-bg: #d1fae5;
    --ensure-border: #10b981;
    --inline-code-bg: #e2e8f0;
    --glow-color: rgba(0, 212, 170, 0.3);
    --circuit-line: #00d4aa;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Mode - Circuit board at night */
        --primary-color: #e2e8f0;
        --secondary-color: #00ffcc;     /* Bright circuit glow */
        --accent-color: #ff6b6b;
        --background-color: #0a0a1a;    /* Deep space black */
        --surface-color: #12122a;       /* Dark panel */
        --code-background: #080818;
        --text-color: #e2e8f0;
        --text-muted: #94a3b8;
        --border-color: #2d3748;
        --success-color: #00ffcc;
        --warning-color: #fbbf24;
        --header-gradient-start: #000010;
        --header-gradient-end: #0f172a;
        --table-hover: #1a1a3a;
        --feature-bg: #1a1a3a;
        --api-bg: #0f0f28;
        --require-bg: #3d2e0a;
        --require-border: #f59e0b;
        --ensure-bg: #052e1c;
        --ensure-border: #00ffcc;
        --inline-code-bg: #1e293b;
        --glow-color: rgba(0, 255, 204, 0.2);
        --circuit-line: #00ffcc;
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: background-color 0.3s, color 0.3s;
}

/* Header - Tower silhouette with circuit glow */
header {
    background: linear-gradient(180deg, var(--header-gradient-start) 0%, var(--header-gradient-end) 100%);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Circuit pattern overlay */
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(90deg, var(--circuit-line) 1px, transparent 1px),
        linear-gradient(var(--circuit-line) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.03;
    pointer-events: none;
}

header .logo-container {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

header img.logo {
    max-width: 200px;
    height: auto;
    filter: drop-shadow(0 0 20px var(--glow-color));
    transition: filter 0.3s;
}

header img.logo:hover {
    filter: drop-shadow(0 0 30px var(--glow-color)) brightness(1.1);
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

header .tagline {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 400;
    position: relative;
    z-index: 1;
}

header .badges {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* Navigation - Sleek bar */
nav {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

@media (prefers-color-scheme: dark) {
    nav {
        background: rgba(18, 18, 42, 0.95);
    }
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
    justify-content: center;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.2s;
}

nav a:hover {
    color: var(--secondary-color);
}

nav a:hover::after {
    width: 100%;
}

/* Main Content */
main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2.5rem;
}

section {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid var(--border-color);
    position: relative;
}

/* Subtle circuit accent on sections */
section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color) 0%, transparent 100%);
    border-radius: 12px 0 0 12px;
    opacity: 0.6;
}

h2 {
    color: var(--primary-color);
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

h2::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--secondary-color);
}

h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Code Blocks - Terminal style */
pre {
    background: var(--code-background);
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
    position: relative;
}

pre::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 12px;
    width: 12px;
    height: 12px;
    background: #ff5f56;
    border-radius: 50%;
    box-shadow: 20px 0 0 #ffbd2e, 40px 0 0 #27c93f;
}

pre code {
    display: block;
    padding-top: 1rem;
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.875rem;
}

p code, li code, td code {
    background: var(--inline-code-bg);
    color: var(--secondary-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85em;
}

/* Syntax Highlighting - Circuit colors */
.keyword { color: #ff79c6; }
.type { color: #8be9fd; }
.string { color: #f1fa8c; }
.comment { color: #6272a4; }
.feature { color: #50fa7b; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    border-radius: 8px;
    overflow: hidden;
}

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

th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@media (prefers-color-scheme: dark) {
    th {
        background: linear-gradient(90deg, var(--header-gradient-end) 0%, #1e3a5f 100%);
    }
}

tr:hover {
    background: var(--table-hover);
}

/* Feature Cards - Circuit node style */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.feature-card {
    background: var(--feature-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 1.5rem;
    left: -1px;
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--secondary-color);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 212, 170, 0.15);
    border-color: var(--secondary-color);
}

.feature-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
    padding-left: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    margin-bottom: 0;
    font-size: 0.95rem;
    padding-left: 1rem;
}

/* API Reference - Technical documentation style */
.api-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--api-bg);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.api-section h3 {
    margin-top: 0;
    color: var(--secondary-color);
    font-family: 'JetBrains Mono', monospace;
}

.signature {
    background: var(--code-background);
    color: var(--secondary-color);
    padding: 1rem 1.5rem;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    margin: 1rem 0;
    overflow-x: auto;
    border-left: 3px solid var(--secondary-color);
}

.contracts {
    margin: 1rem 0;
}

.contracts h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contracts .require, .contracts .ensure {
    padding: 0.75rem 1rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.contracts .require {
    background: var(--require-bg);
    border-left: 3px solid var(--require-border);
}

.contracts .ensure {
    background: var(--ensure-bg);
    border-left: 3px solid var(--ensure-border);
}

/* Footer */
footer {
    background: linear-gradient(180deg, var(--header-gradient-end) 0%, var(--header-gradient-start) 100%);
    color: #94a3b8;
    text-align: center;
    padding: 3rem 2rem;
    margin-top: 2rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--secondary-color) 50%, transparent 100%);
}

footer a {
    color: var(--secondary-color);
}

footer .copyright {
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Badges - Circuit chip style */
.badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-rfc {
    background: rgba(0, 212, 170, 0.2);
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

.badge-version {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border: 1px solid #10b981;
}

.badge-license {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid #fbbf24;
}

/* Quick Start Box */
.quick-start {
    background: var(--api-bg);
    border: 2px solid var(--secondary-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    position: relative;
}

.quick-start::before {
    content: 'QUICK START';
    position: absolute;
    top: -12px;
    left: 1rem;
    background: var(--surface-color);
    padding: 0 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--secondary-color);
    letter-spacing: 0.05em;
}

.quick-start h3 {
    margin-top: 0;
    color: var(--secondary-color);
}

/* Lists */
ul, ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    position: relative;
}

ul li::marker {
    color: var(--secondary-color);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 2rem 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    header img.logo {
        max-width: 140px;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    main {
        padding: 1rem;
    }

    section {
        padding: 1.25rem;
    }

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

    pre::before {
        display: none;
    }

    pre code {
        padding-top: 0;
    }
}