/* ── Tron Base: CSS Custom Properties ───────────────────────────────────────── */
@font-face {
    font-family: 'Share Tech Mono';
    src: url('/fonts/ShareTechMono/ShareTechMono-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* Self-hosted theme fonts (offline-ready, latin subset). Selectable in the theme drawer. */
@font-face {
    font-family: 'Orbitron';
    src: url('/fonts/Orbitron/Orbitron-400.woff2') format('woff2');
    font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
    font-family: 'Orbitron';
    src: url('/fonts/Orbitron/Orbitron-700.woff2') format('woff2');
    font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
    font-family: 'JetBrains Mono';
    src: url('/fonts/JetBrainsMono/JetBrainsMono-400.woff2') format('woff2');
    font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
    font-family: 'JetBrains Mono';
    src: url('/fonts/JetBrainsMono/JetBrainsMono-700.woff2') format('woff2');
    font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono/IBMPlexMono-400.woff2') format('woff2');
    font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono/IBMPlexMono-700.woff2') format('woff2');
    font-weight: 700; font-style: normal; font-display: swap;
}

:root {
    /* Theme variables — patched by theme-changer.js */
    --accent:       #00FFFF;
    --accent-dim:   #1F9BA3;   /* lightened from #007F7F for WCAG AA text contrast */
    --glow:         #00FFFF;
    --bg:           #000000;
    --bg-panel:     #010d1a;
    --bg-card:      #020e1f;
    --text:         #a8d8ea;
    --text-bright:  #e0f7ff;
    --border:       #003d5c;
    --font-family:  'Share Tech Mono', 'Courier New', monospace;
    --font-size:    16px;

    /* Derived */
    --glow-sm:  0 0 4px var(--glow),  0 0 8px  var(--glow);
    --glow-md:  0 0 6px var(--glow),  0 0 16px var(--glow);
    --glow-lg:  0 0 10px var(--glow), 0 0 30px var(--glow), 0 0 60px var(--glow);
    --border-glow: 1px solid var(--accent);
}

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

html {
    font-size: var(--font-size);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ── Grid Background ────────────────────────────────────────────────────────── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--accent-dim) 1px, transparent 1px),
        linear-gradient(90deg, var(--accent-dim) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.07;
    pointer-events: none;
    z-index: 0;
}

/* ── Scanline Overlay ───────────────────────────────────────────────────────── */
/* Static horizontal scanlines for the CRT look. Can be switched off from the theme
   drawer (adds `.no-scanlines` to <html>) for maximum text clarity. */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.15) 2px,
        rgba(0,0,0,0.15) 4px
    );
    pointer-events: none;
    z-index: 9999;
}
html.no-scanlines body::after { display: none; }

/* ── Typography ─────────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
    color: var(--accent);
    text-shadow: var(--glow-sm);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: text-shadow 0.2s;
}
a:hover { text-shadow: var(--glow-md); }

/* ── Tron Card ──────────────────────────────────────────────────────────────── */
.tron-card {
    background: var(--bg-card);
    border: var(--border-glow);
    box-shadow: var(--glow-sm), inset 0 0 30px rgba(0,0,0,0.5);
    padding: 1.5rem;
    position: relative;
}

.tron-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn-tron {
    display: inline-block;
    padding: 0.6rem 1.4rem;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    font-family: var(--font-family);
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, color 0.2s;
    text-shadow: var(--glow-sm);
    box-shadow: var(--glow-sm);
}
.btn-tron:hover {
    background: var(--accent);
    color: var(--bg);
    box-shadow: var(--glow-md);
    text-shadow: none;
}
.btn-tron:active { transform: scale(0.97); }

.btn-tron-danger {
    border-color: #ff4444;
    color: #ff4444;
    text-shadow: 0 0 4px #ff4444;
    box-shadow: 0 0 4px #ff4444;
}
.btn-tron-danger:hover {
    background: #ff4444;
    color: #000;
}

/* ── Form Controls ──────────────────────────────────────────────────────────── */
.tron-input {
    background: #000d1a;
    border: 1px solid var(--border);
    border-bottom-color: var(--accent-dim);
    color: var(--text-bright);
    font-family: var(--font-family);
    font-size: inherit;
    padding: 0.5rem 0.75rem;
    width: 100%;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.tron-input:focus {
    border-color: var(--accent);
    box-shadow: var(--glow-sm);
}

/* ── Utility ────────────────────────────────────────────────────────────────── */
.glow-text { color: var(--accent); text-shadow: var(--glow-sm); }
.panel-title {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--accent-dim);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}
.status-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    margin-right: 0.4rem;
}
.status-dot.online  { background: #00ff88; box-shadow: 0 0 6px #00ff88; }
.status-dot.offline { background: #ff4444; box-shadow: 0 0 6px #ff4444; }
