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

:root {
    --bg: #0a0a1a;
    --surface: #1a1a2e;
    --border: #2a2a40;
    --accent: #FF6B35;
    --accent-dim: rgba(255, 107, 53, 0.15);
    --text: #e0e0e0;
    --text-muted: #888;
    --green: #00e676;
    --yellow: #ffd740;
    --red: #ff5252;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    user-select: none;
}

.hidden { display: none !important; }

.app-view {
    display: none;
    flex-direction: column;
    height: 100vh;
}

.app-view.visible {
    display: flex;
}

/* ── Login ── */
.login-view {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: radial-gradient(ellipse at center, #1a1a3e 0%, var(--bg) 70%);
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    max-width: 380px;
    width: 90%;
}

.login-card h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.login-card p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.btn-hf {
    background: #FFD21E;
    color: #1a1a1a;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.15s, box-shadow 0.15s;
}

.btn-hf:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 210, 30, 0.3);
}

/* ── Header ── */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.brand {
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent);
}

.brand span {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.85rem;
    margin-left: 0.4rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-logout {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.btn-logout:hover { border-color: var(--text-muted); }

/* ── Main layout ── */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* ── Video ── */
.video-container {
    flex: 1;
    position: relative;
    background: #000;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.video-container canvas {
    position: absolute;
    pointer-events: none;
}

/* ── HUD badges ── */
.hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    padding: 0.6rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hud-top, .hud-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.badge {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    white-space: nowrap;
}

.badge.status-disconnected { border-left: 3px solid var(--red); }
.badge.status-connecting { border-left: 3px solid var(--yellow); }
.badge.status-connected { border-left: 3px solid var(--green); }
.badge.status-streaming { border-left: 3px solid var(--green); }

.badge.tracking-active { border-left: 3px solid var(--green); }
.badge.tracking-searching { border-left: 3px solid var(--yellow); }
.badge.tracking-disabled { border-left: 3px solid var(--text-muted); }

.badge-group {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.model-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.model-loading .spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 0.8rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Controls bar ── */
.controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.8rem;
    background: var(--surface);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.controls select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    min-width: 120px;
}

.btn {
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-connect { background: var(--accent); color: #fff; }
.btn-start { background: var(--green); color: #111; }
.btn-stop { background: var(--red); color: #fff; }

.spacer { flex: 1; }

/* ── Toggle ── */
.toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    cursor: pointer;
}

.toggle input[type="checkbox"] {
    appearance: none;
    width: 36px;
    height: 20px;
    background: var(--border);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: background 0.2s;
}

.toggle input[type="checkbox"]::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
}

.toggle input[type="checkbox"]:checked {
    background: var(--accent);
}

.toggle input[type="checkbox"]:checked::after {
    transform: translateX(16px);
}

/* ── Tuning panel ── */
.tuning {
    display: flex;
    gap: 1.5rem;
    padding: 0.5rem 0.8rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    flex-wrap: wrap;
    align-items: center;
}

.tuning label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.tuning input[type="range"] {
    width: 80px;
    accent-color: var(--accent);
}

.tuning .value {
    font-family: 'SF Mono', monospace;
    color: var(--text);
    min-width: 2.5em;
    text-align: right;
}

.btn-tune {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
}

.btn-tune:hover { border-color: var(--accent); color: var(--accent); }

/* ── Responsive ── */
@media (max-width: 600px) {
    .controls { gap: 0.3rem; }
    .btn { padding: 0.35rem 0.6rem; font-size: 0.75rem; }
    .tuning { gap: 0.8rem; }
    .tuning input[type="range"] { width: 60px; }
}