/* SpikyPanda — Shared Dark Theme */
:root {
    --primary: #00d4ff;
    --bg: #1a1a2e;
    --panel: #16213e;
    --panel-border: #0f3460;
    --input-bg: #0f3460;
    --input-border: #1a4a8a;
    --text: #e0e0e0;
    --text-muted: #888;
    --text-label: #aaa;
    --log-bg: #0a0a1a;
    --log-text: #8f8;
    --success: #4f4;
    --error: #f44;
}

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

/* Body */
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 20px;
    line-height: 1.5;
}

/* Typography */
h1 {
    text-align: center;
    margin-bottom: 4px;
    font-size: 1.6em;
    color: var(--primary);
}

h2 {
    font-size: 1.1em;
    margin-bottom: 10px;
    color: var(--primary);
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85em;
    margin-bottom: 20px;
}

/* Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Panels */
.panel {
    background: var(--panel);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--panel-border);
}

.panel h2 {
    font-size: 1.1em;
    margin-bottom: 10px;
    color: var(--primary);
}

/* Controls */
.controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

label {
    font-size: 0.9em;
    color: var(--text-label);
}

select,
input[type=number] {
    background: var(--input-bg);
    color: var(--text);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 0.9em;
}

button {
    background: var(--primary);
    color: var(--bg);
    border: none;
    border-radius: 4px;
    padding: 8px 20px;
    font-size: 0.9em;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

button:hover {
    opacity: 0.85;
}

button:disabled {
    background: #555;
    color: #999;
    cursor: not-allowed;
}

/* Log */
.log {
    background: var(--log-bg);
    border-radius: 4px;
    padding: 10px;
    font-family: 'Cascadia Code', monospace;
    font-size: 0.8em;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.6;
    color: var(--log-text);
    white-space: pre-wrap;
}

/* Stats */
.stats {
    display: flex;
    gap: 20px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat .value {
    font-size: 2em;
    font-weight: bold;
    color: var(--primary);
}

.stat .label {
    font-size: 0.8em;
    color: var(--text-muted);
}

/* Progress bar */
.progress-bar {
    background: var(--log-bg);
    border-radius: 4px;
    height: 6px;
    margin-top: 8px;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.1s;
    width: 0%;
}

/* Status */
#status {
    color: var(--text-label);
    font-size: 0.85em;
    margin-top: 6px;
}

/* Navigation bar */
.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    margin: -20px -20px 20px -20px;
    background: rgba(15, 52, 96, 0.6);
    border-bottom: 1px solid var(--panel-border);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1em;
}

.nav-logo img {
    border-radius: 4px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: var(--text-label);
    text-decoration: none;
    font-size: 0.9em;
    transition: color 0.2s;
}

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

/* Sample hero banner — image background with gradient overlay */
.sample-hero {
    position: relative;
    min-height: 400px;
    background: var(--bg);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    display: flex;
    align-items: flex-end;
    margin: -20px -20px 20px -20px;
}

.sample-hero-overlay {
    width: 100%;
    padding: 2rem 2rem 1.5rem;
    background: linear-gradient(transparent, rgba(26, 26, 46, 0.85) 35%, var(--bg));
    text-align: center;
}

.sample-hero-overlay h1 {
    font-size: 1.8rem;
    margin-bottom: 4px;
}

.sample-hero-overlay .subtitle {
    margin-bottom: 0;
}

.wallpaper-btn {
    position: absolute;
    top: 12px;
    right: 16px;
    background: rgba(0, 212, 255, 0.15);
    border: 1px solid rgba(0, 212, 255, 0.4);
    color: var(--primary);
    font-size: 0.75em;
    padding: 5px 12px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.wallpaper-btn:hover {
    background: rgba(0, 212, 255, 0.3);
}

/* GitHub link icon */
.github-link {
    position: absolute;
    top: 12px;
    right: 200px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s;
    z-index: 10;
}
.github-link:hover {
    color: #fff;
}

/* Collapsible panels */
.collapsible-header {
    cursor: pointer;
    user-select: none;
}

.collapsible-header h2 {
    margin-bottom: 0;
    display: inline;
}

.collapsible-arrow {
    display: inline-block;
    margin-left: 8px;
    font-size: 0.7em;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.collapsible-header.open .collapsible-arrow {
    transform: rotate(180deg);
}

.collapsible-body {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
    margin-top: 0;
}

.collapsible-body.open {
    max-height: 2000px;
    opacity: 1;
    margin-top: 10px;
}

/* Code block with copy button */
.code-block {
    position: relative;
    background: var(--log-bg);
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    padding: 16px 48px 16px 16px;
    margin-top: 10px;
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    font-family: 'Cascadia Code', Consolas, monospace;
    font-size: 0.82em;
    line-height: 1.6;
    color: var(--log-text);
    white-space: pre;
}

.code-block .copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--text-muted);
    font-size: 0.75em;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
}

.code-block .copy-btn:hover {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.2);
}

.code-block .copy-btn.copied {
    color: var(--success);
    border-color: var(--success);
}

/* Sample navigation / breadcrumb */
.sample-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.sample-nav a {
    color: var(--text-label);
    text-decoration: none;
}

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

.sample-nav .sep {
    color: var(--text-muted);
}