/* ─── main.css ──────────────────────────────────────────────────────────────
   Gufa Resonance — Multi-Space Platform
   Design: dark, glassmorphic, monospace, reactive accent color via CSS var
   ─────────────────────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
    --accent:   #00e5ff;
    --bg:       #010103;
    --surface:  rgba(10, 10, 18, 0.72);
    --border:   rgba(255, 255, 255, 0.08);
    --text:     #c8c8d0;
    --text-dim: #555566;
    --font:     'Space Mono', 'Courier New', monospace;
    --radius:   14px;
    --glow:     0 0 24px color-mix(in srgb, var(--accent) 30%, transparent);
}

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

body {
    overflow: hidden;
    background: var(--bg);
    font-family: var(--font);
    font-size: 13px;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

canvas { display: block; }

/* ─── Start overlay ──────────────────────────────────────────────────────── */
#start-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 12px;
    background: radial-gradient(ellipse at center, #12122a 0%, #000 100%);
    cursor: pointer;
    z-index: 20;
    transition: opacity 0.6s ease;
}

#start-overlay:hover .enter-hint { color: var(--accent); }

#overlay-title {
    font-size: clamp(1.6rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 0.25em;
    color: #fff;
    text-shadow: 0 0 40px color-mix(in srgb, var(--accent) 60%, transparent);
    transition: text-shadow 0.5s;
}

#overlay-tagline {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    text-transform: uppercase;
}

.enter-hint {
    margin-top: 32px;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: #444;
    border: 1px solid #333;
    padding: 8px 24px;
    border-radius: 999px;
    transition: color 0.3s, border-color 0.3s;
}

#start-overlay:hover .enter-hint {
    border-color: var(--accent);
}

.headphones-note {
    margin-top: 8px;
    font-size: 0.65rem;
    color: #333;
    letter-spacing: 0.15em;
}

/* ─── Main UI panel ──────────────────────────────────────────────────────── */
#ui {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    pointer-events: none;
}

#controls {
    pointer-events: auto;
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--glow), 0 8px 32px rgba(0, 0, 0, 0.6);
    display: inline-flex;
    flex-direction: column;
    gap: 14px;
    min-width: 260px;
    transition: box-shadow 0.5s;
}

/* ─── Panel header ───────────────────────────────────────────────────────── */
.panel-header {
    font-weight: 700;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: #fff;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    text-transform: uppercase;
}

/* ─── Active space badge ─────────────────────────────────────────────────── */
#space-badge {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

#active-space-name {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    transition: color 0.4s;
}

#active-space-desc {
    font-size: 0.65rem;
    color: var(--text-dim);
    line-height: 1.5;
}

/* ─── Space switcher ─────────────────────────────────────────────────────── */
#space-switcher-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.section-label {
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    color: var(--text-dim);
    text-transform: uppercase;
}

#space-switcher {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.space-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    padding: 5px 10px;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}

.space-pill:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255,255,255,0.2);
}

.space-pill.active {
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ─── Import button ──────────────────────────────────────────────────────── */
#import-btn {
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.15);
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    transition: border-color 0.2s, color 0.2s;
    width: 100%;
    text-align: left;
}

#import-btn::before { content: '↑ '; }

#import-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

#import-input { display: none; }

/* ─── Sensitivity slider ─────────────────────────────────────────────────── */
.slider-section { display: flex; flex-direction: column; gap: 6px; }

.slider-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
}

#sens-val {
    color: var(--accent);
    font-weight: 700;
    transition: color 0.4s;
}

input[type=range] {
    width: 100%;
    accent-color: var(--accent);
    cursor: pointer;
    height: 3px;
}

/* ─── Keyboard hints ─────────────────────────────────────────────────────── */
.key-hints {
    font-size: 0.6rem;
    color: var(--text-dim);
    letter-spacing: 0.08em;
    line-height: 1.7;
}

.key-hint-row { display: flex; gap: 6px; align-items: center; }

kbd {
    display: inline-block;
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
    font-family: var(--font);
    font-size: 0.55rem;
    color: #888;
}

/* ─── Legend ─────────────────────────────────────────────────────────────── */
.legend { display: flex; flex-direction: column; gap: 5px; }

.legend-row { display: flex; align-items: center; gap: 8px; font-size: 0.65rem; color: var(--text-dim); }

.dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ─── Toast notification ─────────────────────────────────────────────────── */
#toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    color: var(--text);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 100;
    white-space: nowrap;
}

#toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}