:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --border-color: #334155;
    --accent-blue: #38bdf8;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
}
* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background: var(--bg-dark); color: var(--text-main); min-height: 100vh; padding: 16px; }
.container { max-width: 600px; margin: 0 auto; }
header { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--border-color); margin-bottom: 20px; }
header h1 { font-size: 1.25rem; font-weight: 700; color: var(--accent-blue); display: flex; align-items: center; gap: 8px; }
.card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 12px; padding: 18px; margin-bottom: 16px; }
.card-title { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.metric-box { background: rgba(15, 23, 42, 0.6); padding: 14px; border-radius: 8px; border: 1px solid rgba(255, 255, 255, 0.05); }
.metric-val { font-size: 1.45rem; font-weight: 700; color: #fff; }
.metric-lbl { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }
button { cursor: pointer; border: none; border-radius: 8px; font-weight: 600; transition: opacity 0.2s; }
button:active { opacity: 0.75; }
.btn-primary { background: var(--accent-blue); color: #0f172a; padding: 12px 16px; width: 100%; font-size: 1rem; }
.btn-green { background: var(--accent-green); color: #fff; padding: 14px; width: 100%; font-size: 1rem; }
.btn-red { background: var(--accent-red); color: #fff; padding: 14px; width: 100%; font-size: 1rem; }
.btn-secondary { background: var(--border-color); color: var(--text-main); padding: 8px 12px; font-size: 0.85rem; }
.btn-period {
    background: #243248;
    border: 1px solid #475569;
    color: #e2e8f0;
    padding: 5px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.15s ease-in-out;
}
.btn-period:hover {
    background: #334155;
    border-color: var(--accent-blue);
    color: #fff;
}
.btn-period.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #0f172a;
    font-weight: 700;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}
.input-group { margin-bottom: 14px; }
.input-group label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; }
input, select {
    width: 100%;
    background: #0f172a;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    color-scheme: dark;
}
input:focus { border-color: var(--accent-blue); }
input[type="date"]::-webkit-calendar-picker-indicator,
input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: brightness(0) invert(1) drop-shadow(0 0 2px rgba(56, 189, 248, 0.4));
    cursor: pointer;
    opacity: 1 !important;
    font-size: 1.15rem;
    padding: 2px;
    margin-right: -4px;
}
input[type="number"] { color-scheme: dark; }
.relay-status { display: flex; align-items: center; justify-content: space-between; padding: 12px; border-radius: 8px; margin-bottom: 14px; }
.relay-status.active { background: rgba(34, 197, 94, 0.15); border: 1px solid var(--accent-green); }
.relay-status.inactive { background: rgba(239, 68, 68, 0.15); border: 1px solid var(--accent-red); }
.badge { font-weight: 700; font-size: 0.85rem; padding: 4px 10px; border-radius: 6px; }
.badge-green { background: var(--accent-green); color: #000; }
.badge-red { background: var(--accent-red); color: #fff; }
.countdown-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
.schedule-item { display: flex; justify-content: space-between; align-items: center; padding: 10px; background: rgba(15, 23, 42, 0.4); border-radius: 6px; margin-bottom: 8px; border: 1px solid var(--border-color); }
#qr-reader { width: 100%; border-radius: 8px; overflow: hidden; margin-bottom: 12px; border: 1px solid var(--accent-blue); }
.hidden { display: none !important; }
.status-badge-container { display: flex; align-items: center; cursor: pointer; user-select: none; }
.badge-live-stream { background: rgba(34, 197, 94, 0.2); border: 1px solid var(--accent-green); color: var(--accent-green); padding: 4px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 700; display: flex; align-items: center; gap: 6px; }
.badge-standby-stream { background: rgba(148, 163, 184, 0.1); border: 1px solid var(--border-color); color: var(--text-muted); padding: 4px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; display: flex; align-items: center; gap: 6px; }
.stepper-box { display: flex; flex-direction: column; gap: 1px; }
.stepper-arrow {
    background: #243248;
    border: 1px solid #475569;
    color: #fff;
    font-size: 0.65rem;
    line-height: 1;
    padding: 3px 6px;
    border-radius: 4px;
    cursor: pointer;
    user-select: none;
}
.stepper-arrow:hover { background: #334155; border-color: var(--accent-blue); }
.stepper-arrow:active { background: var(--accent-blue); color: #0f172a; }
.toggle-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.07); }
.toggle-switch { position: relative; width: 44px; height: 24px; display: inline-block; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; cursor: pointer; inset: 0; background-color: #334155; border-radius: 24px; transition: .2s; }
.toggle-slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; border-radius: 50%; transition: .2s; }
input:checked + .toggle-slider { background-color: var(--accent-blue); }
input:checked + .toggle-slider:before { transform: translateX(20px); }
.alert-item { display: flex; align-items: flex-start; gap: 10px; padding: 8px 10px; border-radius: 6px; margin-bottom: 6px; font-size: 0.8rem; background: #162032; }
.alert-badge { padding: 2px 6px; border-radius: 4px; font-weight: 700; font-size: 0.7rem; }
.badge-info { background: rgba(56, 189, 248, 0.2); color: #38bdf8; }
.badge-warning { background: rgba(234, 179, 8, 0.2); color: #eab308; }
.badge-critical { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.75); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 16px; }