/* ════════════════════════════════════════════════════════════
   Soundwart — Generative Music Lab
   Modern dark UI · per-genre accent themes · glassmorphism
   ════════════════════════════════════════════════════════════ */

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

:root {
    --bg: #07070d;
    --card: rgba(255, 255, 255, 0.045);
    --card-hover: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.16);
    --text: #eceef4;
    --dim: rgba(236, 238, 244, 0.45);
    --dimmer: rgba(236, 238, 244, 0.28);
    --accent: #8b7cf6;
    --accent-2: #f472b6;
    --accent-soft: rgba(139, 124, 246, 0.16);
    --glow: rgba(139, 124, 246, 0.35);
    --radius: 16px;
    --radius-sm: 9px;
    --dot-drones: #a78bfa;
    --dot-pads: #60a5fa;
    --dot-percussion: #fb923c;
    --dot-melody: #f472b6;
}

html, body {
    width: 100%; min-height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg); color: var(--text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    transition: background 1s ease;
    background:
        radial-gradient(1200px 700px at 85% -10%, var(--accent-soft), transparent 60%),
        radial-gradient(900px 600px at -10% 110%, var(--accent-soft), transparent 55%),
        var(--bg);
}

/* ── Genre Themes ─────────────────────────────────────────── */
body.theme-ambient {
    --accent: #8b7cf6; --accent-2: #f472b6;
    --accent-soft: rgba(139, 124, 246, 0.16); --glow: rgba(139, 124, 246, 0.35);
    --bg: #0a0a14;
}
body.theme-dark-ambient {
    --accent: #e0455a; --accent-2: #7c2d3e;
    --accent-soft: rgba(224, 69, 90, 0.13); --glow: rgba(224, 69, 90, 0.3);
    --bg: #0a0708;
}
body.theme-trance {
    --accent: #22d3ee; --accent-2: #818cf8;
    --accent-soft: rgba(34, 211, 238, 0.13); --glow: rgba(34, 211, 238, 0.3);
    --bg: #060a14;
}
body.theme-techno {
    --accent: #f5a524; --accent-2: #84cc16;
    --accent-soft: rgba(245, 165, 36, 0.13); --glow: rgba(245, 165, 36, 0.3);
    --bg: #0c0a06;
}

#app-container { position: relative; z-index: 1; display: flex; flex-direction: column; min-height: 100vh; }

/* ── Header ───────────────────────────────────────────────── */
header {
    position: sticky; top: 0; z-index: 100;
    display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
    padding: 12px 24px;
    background: rgba(7, 7, 13, 0.72);
    backdrop-filter: blur(22px) saturate(1.4);
    -webkit-backdrop-filter: blur(22px) saturate(1.4);
    border-bottom: 1px solid var(--border);
}

.logo h1 {
    font-size: 1.25rem; font-weight: 800; letter-spacing: -0.5px; line-height: 1.1;
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.logo .subtitle {
    font-size: 0.58rem; color: var(--dim); text-transform: uppercase;
    letter-spacing: 2.5px; font-weight: 600;
}

/* Transport */
.transport { display: flex; align-items: center; gap: 18px; }

.play-btn {
    width: 46px; height: 46px; border: none; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 22px var(--glow);
    transition: transform 0.15s, box-shadow 0.2s;
}
.play-btn:hover { transform: scale(1.07); box-shadow: 0 4px 32px var(--glow); }
.play-btn:active { transform: scale(0.94); }
.play-btn svg { width: 18px; height: 18px; }

.bpm-group { display: flex; flex-direction: column; gap: 3px; }
.bpm-group > label, .mini-control > label {
    font-size: 0.56rem; color: var(--dim); text-transform: uppercase;
    letter-spacing: 1.4px; font-weight: 700;
}
.bpm-controls { display: flex; align-items: center; gap: 4px; }
.bpm-controls input {
    width: 58px; text-align: center; padding: 5px 2px;
    background: rgba(255, 255, 255, 0.06); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text);
    font-size: 0.95rem; font-weight: 700; font-variant-numeric: tabular-nums;
    outline: none; -moz-appearance: textfield; appearance: textfield;
}
.bpm-controls input::-webkit-inner-spin-button { display: none; }
.bpm-controls input:focus { border-color: var(--accent); }
.step-btn, .tap-btn {
    height: 28px; min-width: 28px; padding: 0 6px;
    background: rgba(255, 255, 255, 0.06); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--dim); cursor: pointer;
    font-size: 0.85rem; font-weight: 700; transition: all 0.15s;
}
.tap-btn { font-size: 0.58rem; letter-spacing: 1px; }
.step-btn:hover, .tap-btn:hover { background: var(--accent-soft); color: var(--text); border-color: var(--accent); }
.tap-btn.flash { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Mini controls (swing / master) */
.mini-control { display: flex; flex-direction: column; gap: 3px; width: 110px; }
.mini-control input[type="range"] { height: 4px; }
.mini-value {
    font-size: 0.6rem; color: var(--dimmer); font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.master-controls { display: flex; gap: 18px; margin-left: auto; }

/* Genre tabs */
.genre-tabs {
    display: flex; gap: 4px; padding: 4px;
    background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border);
    border-radius: 999px;
}
.genre-btn {
    padding: 7px 16px; border: none; border-radius: 999px;
    background: transparent; color: var(--dim); cursor: pointer;
    font-size: 0.76rem; font-weight: 600; transition: all 0.2s;
    white-space: nowrap;
}
.genre-btn:hover { color: var(--text); }
.genre-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff; box-shadow: 0 2px 14px var(--glow);
}
.help-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 27px; height: 27px; border-radius: 50%;
    background: rgba(255,255,255,0.05); border: 1px solid var(--border);
    color: var(--dim); font-size: 0.75rem; font-weight: 800;
    text-decoration: none; transition: all 0.15s; margin-left: 2px;
}
.help-btn:hover { background: var(--accent-soft); color: var(--text); border-color: var(--accent); text-decoration: none; }

/* ── Preset Bar ───────────────────────────────────────────── */
.preset-bar {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    padding: 9px 24px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
}
.preset-bar-label {
    font-size: 0.6rem; color: var(--dim); text-transform: uppercase;
    letter-spacing: 1.6px; font-weight: 700; margin-right: 2px;
}
.preset-bar select {
    min-width: 200px; padding: 7px 12px;
    background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text);
    font-size: 0.8rem; outline: none; cursor: pointer;
}
.preset-bar select:focus { border-color: var(--accent); }
.preset-bar select option { background: #12121d; }
.bar-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 13px; background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--dim); cursor: pointer; font-size: 0.74rem; font-weight: 600;
    transition: all 0.15s;
}
.bar-btn svg { width: 13px; height: 13px; }
.bar-btn:hover { background: var(--accent-soft); color: var(--text); border-color: var(--accent); }
.bar-btn.accent { background: var(--accent-soft); border-color: var(--accent); color: var(--text); }
.bar-btn.accent:hover { background: var(--accent); color: #fff; }
.preset-bar-sep { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
.preset-hint { margin-left: auto; font-size: 0.65rem; color: var(--dimmer); }

/* ── Dashboard ────────────────────────────────────────────── */
#dashboard {
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px; padding: 20px 24px 28px;
    max-width: 1480px; margin: 0 auto; width: 100%; flex-grow: 1;
}

/* ── Track Card ───────────────────────────────────────────── */
.track-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px 18px;
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    display: flex; flex-direction: column; gap: 13px;
    transition: border-color 0.25s, background 0.25s;
}
.track-card:hover { border-color: var(--border-strong); background: var(--card-hover); }

.track-header { display: flex; justify-content: space-between; align-items: center; }
.track-title { display: flex; align-items: center; gap: 9px; }
.track-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-drones { background: var(--dot-drones); box-shadow: 0 0 8px var(--dot-drones); }
.dot-pads { background: var(--dot-pads); box-shadow: 0 0 8px var(--dot-pads); }
.dot-percussion { background: var(--dot-percussion); box-shadow: 0 0 8px var(--dot-percussion); }
.dot-melody { background: var(--dot-melody); box-shadow: 0 0 8px var(--dot-melody); }
.track-header h2 { font-size: 0.88rem; font-weight: 700; letter-spacing: -0.2px; }

.track-actions { display: flex; gap: 5px; }
.mute-btn, .solo-btn {
    width: 27px; height: 27px; border: 1px solid var(--border); border-radius: 7px;
    background: transparent; color: var(--dim); cursor: pointer;
    font-size: 0.66rem; font-weight: 800; transition: all 0.15s;
}
.mute-btn:hover { border-color: #ef4444; color: #ef4444; }
.mute-btn.active { background: #ef4444; border-color: #ef4444; color: #fff; }
.solo-btn:hover { border-color: #fbbf24; color: #fbbf24; }
.solo-btn.active { background: #fbbf24; border-color: #fbbf24; color: #1a1a2e; }

/* ── Track Controls (params) ──────────────────────────────── */
.track-controls {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 9px 14px;
}
.control { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.control-head { display: flex; justify-content: space-between; align-items: baseline; }
.control-head label {
    font-size: 0.58rem; color: var(--dim); text-transform: uppercase;
    letter-spacing: 1px; font-weight: 700;
}
.control-head .control-value {
    font-size: 0.62rem; color: var(--text); font-weight: 700;
    font-variant-numeric: tabular-nums; opacity: 0.85;
}
.control select {
    width: 100%; padding: 5px 8px;
    background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border);
    border-radius: 7px; color: var(--text); font-size: 0.74rem;
    outline: none; cursor: pointer;
}
.control select:focus { border-color: var(--accent); }
.control select option { background: #12121d; }

/* Sliders (filled-track look, painted from JS) */
input[type="range"] {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 5px; border-radius: 3px;
    background: rgba(255, 255, 255, 0.09);
    outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 13px; height: 13px; border-radius: 50%;
    background: #fff; border: 2.5px solid var(--accent);
    box-shadow: 0 1px 8px var(--glow); cursor: pointer;
    transition: transform 0.12s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
input[type="range"]::-moz-range-thumb {
    width: 11px; height: 11px; border-radius: 50%;
    background: #fff; border: 2.5px solid var(--accent);
    box-shadow: 0 1px 8px var(--glow); cursor: pointer;
}

/* ── Pattern Bar ──────────────────────────────────────────── */
.pattern-bar {
    display: flex; align-items: center; gap: 10px;
    padding-top: 2px; border-top: 1px solid var(--border);
    padding-top: 11px;
}
.pattern-label {
    font-size: 0.56rem; color: var(--dimmer); text-transform: uppercase;
    letter-spacing: 1.4px; font-weight: 700;
}
.pattern-slots { display: flex; gap: 4px; }
.slot-btn {
    width: 26px; height: 24px; border: 1px solid var(--border); border-radius: 6px;
    background: rgba(255, 255, 255, 0.04); color: var(--dim);
    font-size: 0.66rem; font-weight: 800; cursor: pointer; transition: all 0.15s;
}
.slot-btn:hover { border-color: var(--accent); color: var(--text); }
.slot-btn.active {
    background: var(--accent); border-color: var(--accent); color: #fff;
    box-shadow: 0 0 10px var(--glow);
}
.slot-btn.pending { border-color: var(--accent-2); color: var(--accent-2); animation: blink 0.5s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0.35; } }

.pattern-tools { display: flex; gap: 4px; margin-left: auto; }
.tool-btn {
    width: 26px; height: 24px; border: 1px solid var(--border); border-radius: 6px;
    background: transparent; color: var(--dimmer); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.15s;
}
.tool-btn svg { width: 12px; height: 12px; }
.tool-btn:hover { background: var(--accent-soft); color: var(--text); border-color: var(--accent); }

/* ── Sequencer ────────────────────────────────────────────── */
.sequencer { display: flex; flex-direction: column; gap: 5px; }
.seq-row { display: grid; grid-template-columns: repeat(16, 1fr); gap: 3px; }
.seq-row.with-label { grid-template-columns: 44px repeat(16, 1fr); }
.lane-label {
    font-size: 0.54rem; color: var(--dimmer); font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.8px;
    display: flex; align-items: center;
}

.seq-cell {
    position: relative; height: 30px; border-radius: 5px;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid transparent;
    cursor: pointer; overflow: hidden;
    transition: background 0.12s, border-color 0.12s;
    touch-action: none; user-select: none; -webkit-user-select: none;
}
.seq-row.compact .seq-cell { height: 18px; border-radius: 4px; }
.seq-cell.beat { background: rgba(255, 255, 255, 0.085); }
.seq-cell:hover { border-color: var(--border-strong); }
.seq-cell .fill {
    position: absolute; left: 0; right: 0; bottom: 0; height: 0%;
    background: linear-gradient(180deg, var(--accent-2), var(--accent));
    border-radius: 4px 4px 0 0;
    box-shadow: 0 0 10px var(--glow);
    transition: height 0.07s ease-out;
    pointer-events: none;
}
.seq-cell.current { border-color: rgba(255, 255, 255, 0.75); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35), 0 0 8px rgba(255,255,255,0.12); }
.seq-cell.current .fill { filter: brightness(1.35); }

/* ── Visualizer ───────────────────────────────────────────── */
#visualizer-container {
    position: fixed; inset: 0; z-index: 0; opacity: 0.32; pointer-events: none;
}
canvas { width: 100%; height: 100%; display: block; }

/* ── Toasts ───────────────────────────────────────────────── */
#toast-container {
    position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%);
    z-index: 300; display: flex; flex-direction: column; gap: 8px; align-items: center;
    pointer-events: none;
}
.toast {
    padding: 10px 20px; border-radius: 999px;
    background: rgba(18, 18, 29, 0.92); border: 1px solid var(--border-strong);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    color: var(--text); font-size: 0.8rem; font-weight: 600;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    opacity: 0; transform: translateY(10px);
    transition: opacity 0.25s, transform 0.25s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-color: #ef4444; color: #fca5a5; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1180px) {
    .master-controls { margin-left: 0; }
}
@media (max-width: 980px) {
    #dashboard { grid-template-columns: 1fr; }
    header { gap: 16px; }
    .preset-hint { display: none; }
}
@media (max-width: 640px) {
    header { padding: 10px 14px; }
    #dashboard { padding: 14px; }
    .track-controls { grid-template-columns: repeat(2, 1fr); }
    .preset-bar { padding: 8px 14px; }
    .preset-bar select { min-width: 140px; flex: 1; }
    .genre-tabs { order: 5; width: 100%; overflow-x: auto; }
    .master-controls { width: 100%; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.12); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.22); }