/* --- THEME VARIABLES --- */

/* 1. VOID (Default) */
:root {
    --bg-color: #000000;
    --text-primary: #ffffff;
    --text-dim: #333333;
    --accent: #ffffff;
    --grid-color: #333333;
    
    /* Graph */
    --gh-bg-color: #000000;
    --gh-text-default-color: #ffffff;
    --gh-cell-level0-color: #111111;
    --gh-border-card-color: #333333;
    --gh-border-color: #1a1a1a;
    --gh-corner-color: #ffffff;
    
    /* UI */
    --gh-input-bg: transparent;
    --gh-input-border: #333;
    --gh-input-text: #fff;
    --gh-btn-bg: #111;
    --gh-btn-text: #888;
    --gh-btn-hover: #fff;
    --gh-btn-hover-text: #000;
}

/* 2. SLATE (Textured Dark Grey) */
[data-theme="slate"] {
    --bg-color: #0c0c0c; 
    --text-primary: #f0f0f0;
    --text-dim: #777777;
    --accent: #999999;
    --grid-color: transparent;

    --gh-bg-color: #141414;
    --gh-text-default-color: #eeeeee;
    --gh-cell-level0-color: #222222;
    --gh-border-card-color: #333333;
    --gh-border-color: #333333;
    --gh-corner-color: #666666;
    
    --gh-input-bg: #141414;
    --gh-input-border: #333;
    --gh-input-text: #eee;
    --gh-btn-bg: #222;
    --gh-btn-text: #999;
    --gh-btn-hover: #333;
    --gh-btn-hover-text: #fff;
}

/* 3. MIDNIGHT (Deep Indigo/Purple) */
[data-theme="midnight"] {
    --bg-color: #050505; 
    --text-primary: #e2e8f0;
    --text-dim: #64748b;
    --accent: #818cf8;
    --grid-color: #1e1b4b;

    --gh-bg-color: #0f1016;
    --gh-text-default-color: #f1f5f9;
    --gh-cell-level0-color: #1e202e;
    --gh-border-card-color: #2d2a45;
    --gh-border-color: #2d2a45;
    --gh-corner-color: #818cf8;
    
    --gh-input-bg: #0f1016;
    --gh-input-border: #2d2a45;
    --gh-input-text: #f1f5f9;
    --gh-btn-bg: #1e202e;
    --gh-btn-text: #94a3b8;
    --gh-btn-hover: #818cf8;
    --gh-btn-hover-text: #fff;
}

/* 4. GLACIER (Clean Light) */
[data-theme="glacier"] {
    --bg-color: #ffffff; 
    --text-primary: #0f172a;
    --text-dim: #94a3b8;
    --accent: #0ea5e9;
    --grid-color: #f1f5f9;

    --gh-bg-color: #ffffff;
    --gh-text-default-color: #334155;
    --gh-cell-level0-color: #f1f5f9;
    --gh-border-card-color: #e2e8f0;
    --gh-border-color: #cbd5e1;
    --gh-corner-color: #0f172a;
    
    --gh-input-bg: #f8fafc;
    --gh-input-border: #e2e8f0;
    --gh-input-text: #0f172a;
    --gh-btn-bg: #f1f5f9;
    --gh-btn-text: #64748b;
    --gh-btn-hover: #0f172a;
    --gh-btn-hover-text: #fff;
}

/* 5. CYBER (Neon / Cyberpunk) */
[data-theme="cyber"] {
    --bg-color: #050505; 
    --text-primary: #00ff41; /* Matrix Green */
    --text-dim: #008f11;
    --accent: #00ff41;
    --grid-color: #003b00;

    --gh-bg-color: #000000;
    --gh-text-default-color: #00ff41;
    --gh-cell-level0-color: #001a00;
    --gh-border-card-color: #003b00;
    --gh-border-color: #00ff41;
    --gh-corner-color: #00ff41;
    
    --gh-input-bg: #000;
    --gh-input-border: #00ff41;
    --gh-input-text: #00ff41;
    --gh-btn-bg: #001a00;
    --gh-btn-text: #008f11;
    --gh-btn-hover: #00ff41;
    --gh-btn-hover-text: #000;
}


/* --- BASE STYLES --- */

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

body {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'SF Mono', 'Fira Code', Consolas, 'Courier New', monospace;
    overflow-y: auto;
    position: relative;
    padding: 4rem 0;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 100px 100px;
    opacity: 0.1;
    z-index: -1;
    pointer-events: none;
    transition: all 0.5s ease;
}

/* Texture Overlays */
[data-theme="slate"] .grid-bg {
    background-image: 
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E"),
        radial-gradient(circle at 50% 0%, #2a2a2a 0%, #0c0c0c 70%);
    background-size: 200px 200px, 100% 100%;
    opacity: 1;
}

/* Cyber Theme Grid Glow */
[data-theme="cyber"] .grid-bg {
    background-image: 
        linear-gradient(rgba(0, 255, 65, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 65, 0.1) 1px, transparent 1px);
    opacity: 0.3;
    box-shadow: inset 0 0 100px rgba(0, 20, 0, 0.9);
}


/* Center Crosshair REMOVED */

.main-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    z-index: 10;
    opacity: 0;
    animation: fadeIn 1.5s ease-out forwards;
    width: 100%;
    max-width: 900px;
}

h1 {
    font-size: 0.8rem;
    letter-spacing: 0.5em;
    text-transform: uppercase;
    color: var(--text-dim);
    position: relative;
    margin-top: 5vh;
    transition: color 0.5s ease;
}

h1::after {
    content: '';
    display: block;
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-dim), transparent);
    position: absolute;
    left: 50%;
    bottom: -50px;
}

/* Input Section */
.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    position: relative;
    align-items: center;
    flex-direction: column; /* Stacked for better mobile/layout */
}

.input-controls {
    display: flex;
    gap: 1rem;
}

.input-field {
    background: var(--gh-input-bg);
    border: 1px solid var(--gh-input-border);
    color: var(--gh-input-text);
    padding: 0.8rem 1.2rem;
    font-family: inherit;
    font-size: 0.9rem;
    width: 250px;
    outline: none;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.input-field:focus {
    border-color: var(--accent);
}

.input-button {
    background: var(--gh-btn-bg);
    border: 1px solid var(--gh-input-border);
    color: var(--gh-btn-text);
    padding: 0 1.5rem;
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    height: 46px;
}

.input-button:hover {
    background: var(--gh-btn-hover);
    color: var(--gh-btn-hover-text);
}

/* Theme Picker Container */
.theme-picker {
    display: flex;
    gap: 8px;
    padding: 8px;
    background: var(--gh-btn-bg);
    border: 1px solid var(--gh-input-border);
    border-radius: 40px;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    transition: transform 0.2s ease, border-color 0.2s ease;
    border: 2px solid transparent;
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn.active {
    border-color: var(--text-primary);
}

/* Theme Button Colors */
.theme-btn[data-theme="void"] { background: #000; border: 1px solid #333; }
.theme-btn[data-theme="slate"] { background: #222; border: 1px solid #555; }
.theme-btn[data-theme="midnight"] { background: #0f1016; border: 1px solid #818cf8; }
.theme-btn[data-theme="glacier"] { background: #f8fafc; border: 1px solid #cbd5e1; }
.theme-btn[data-theme="cyber"] { background: #000; border: 1px solid #00ff41; }


/* The Graph Container */
#gh {
    background: var(--gh-bg-color) !important;
    padding: 2rem !important;
    border: 1px solid var(--gh-border-color) !important;
    transition: all 0.5s ease;
    position: relative;
    border-radius: 4px; /* Slight radius for cleaner look */
}

/* Slate Specific Graph Texture */
[data-theme="slate"] #gh {
    background-image: 
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E"),
        linear-gradient(135deg, #1f1f1f 0%, #141414 100%);
    box-shadow: 
        0 20px 40px -10px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.1);
}

/* Glacier Specific Shadow */
[data-theme="glacier"] #gh {
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

/* Cyber Specific Glow */
[data-theme="cyber"] #gh {
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.1);
}

/* Corner markers */
#gh::before, #gh::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 1px solid var(--gh-corner-color);
    transition: all 0.3s ease;
    opacity: 0.5;
}
#gh::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
#gh::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

#gh:hover {
    border-color: var(--text-dim) !important;
    box-shadow: 0 0 50px rgba(128, 128, 128, 0.1);
}

#gh:hover::before, #gh:hover::after {
    width: 100%;
    height: 100%;
    opacity: 0.8;
}

/* Docs */
.docs-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 6rem;
    padding: 2rem;
    border-top: 1px solid var(--text-dim);
    transition: border-color 0.5s ease;
}

.docs-section h2 {
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 0.2em;
    font-weight: normal;
    margin-bottom: 1rem;
}

.code-block {
    background: rgba(0,0,0,0.02);
    border: 1px solid var(--text-dim);
    padding: 0;
    position: relative;
    font-size: 0.8rem;
    color: var(--text-dim);
    transition: border-color 0.5s ease;
}

.code-header {
    background: var(--gh-btn-bg);
    color: var(--gh-btn-text);
    padding: 0.5rem 1rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 1px solid var(--text-dim);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--gh-btn-text);
    color: var(--gh-btn-text);
    font-family: inherit;
    font-size: 0.6rem;
    padding: 2px 8px;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: var(--gh-btn-text);
    color: var(--gh-btn-bg);
}

.code-block pre {
    padding: 1.5rem;
    overflow-x: auto;
    color: var(--text-dim);
    line-height: 1.6;
}

.code-keyword { color: #569CD6; }
.code-string { color: #CE9178; }
.code-attr { color: #9CDCFE; }
.code-tag { color: #808080; }

@keyframes fadeIn {
    from { opacity: 0; filter: blur(10px); }
    to { opacity: 1; filter: blur(0); }
}

/* Status Dot */
.meta-info {
    font-size: 0.7rem;
    color: var(--text-dim);
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 6px;
    height: 6px;
    background-color: #00ff00;
    border-radius: 50%;
    box-shadow: 0 0 10px #00ff00;
}
.site-footer {
    margin-top: 4rem;
    font-size: 0.7rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.7;
    text-align: center;
}

.site-footer a {
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
    font-weight: bold;
}

.site-footer a:hover {
    border-bottom-color: var(--text-primary);
    text-shadow: 0 0 10px var(--text-primary);
}