:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e8ec;
  --muted: #8b93a1;
  --accent: #4f8cff;
  --accent-text: #ffffff;
  --danger: #ff5d5d;
  --ok: #43d17a;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html[data-theme="light"] {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #eef1f6;
  --border: #dde2ea;
  --text: #1a1d23;
  --muted: #69707d;
  --accent: #2f6fed;
  --accent-text: #ffffff;
  --danger: #d33;
  --ok: #1f9d57;
  --shadow: 0 8px 30px rgba(20, 30, 60, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }

/* ---- top bar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.pill {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
}

/* ---- buttons ---- */
.btn {
  font: inherit;
  font-size: 14px;
  padding: 7px 13px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; }
.btn.icon { padding: 7px 10px; }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; }
.btn.primary:hover { filter: brightness(1.08); background: var(--accent); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.btn.danger:hover { background: color-mix(in srgb, var(--danger) 14%, transparent); }
.btn.small { font-size: 13px; padding: 5px 10px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- layout ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 24px 20px 60px; }
.section-title { font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 24px 0 12px; }
.grid-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.input {
  font: inherit;
  padding: 9px 12px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  width: 100%;
}
.input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 1px; }
.filter { max-width: 320px; }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }

/* ---- channel grid ---- */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
}
.chan {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 104px;
  transition: border-color 0.15s, transform 0.05s;
}
.chan:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.chan.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.chan-top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.chan-num { font-weight: 700; font-variant-numeric: tabular-nums; font-size: 15px; }
.chan-name { color: var(--muted); font-size: 13px; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; }
.badge { font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 6px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.badge.hd { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.badge.live { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.chan-actions { margin-top: auto; }

/* ---- active cards ---- */
.active-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.active-card { background: var(--surface); border: 1px solid var(--accent); border-radius: var(--radius); overflow: hidden; }
.thumb-wrap { aspect-ratio: 16 / 9; background: #000; position: relative; }
.thumb-wrap img { width: 100%; height: 100%; object-fit: contain; display: block; }
.thumb-wrap .placeholder { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); font-size: 13px; }
.live-tag { position: absolute; top: 8px; left: 8px; font-size: 11px; font-weight: 700; color: #fff; background: rgba(0,0,0,0.55); padding: 3px 8px; border-radius: 6px; display: flex; align-items: center; gap: 6px; }
.live-tag .blink { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); animation: blink 1.6s infinite; }
.live-tag.bad .blink { background: var(--danger); }
.live-tag.warn .blink { background: #e0a32e; }
.active-body .stats { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.25} }
.active-body { padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; }
.active-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.active-title { font-weight: 700; }
.urls { display: flex; flex-direction: column; gap: 6px; }
.url-row { display: flex; align-items: center; gap: 6px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; }
.url-row code { font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.url-row .tag { font-size: 10px; color: var(--muted); text-transform: uppercase; }

/* ---- overlays / modals ---- */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); backdrop-filter: blur(3px); display: grid; place-items: center; z-index: 50; padding: 20px; }
.modal { width: 100%; max-width: 420px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.card h2 { margin: 0 0 4px; }
.card h3 { margin: 0 0 8px; font-size: 15px; }
.field { display: flex; flex-direction: column; gap: 6px; margin: 14px 0; font-size: 14px; }
.field > span { color: var(--muted); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.seg { display: flex; gap: 14px; }
.seg label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); }
.advanced summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.sep { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

/* ---- toast ---- */
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
  padding: 11px 16px; border-radius: 10px; z-index: 60; font-size: 14px; max-width: 90vw;
}
.toast.ok { border-color: color-mix(in srgb, var(--ok) 50%, var(--border)); }
.toast.err { border-color: color-mix(in srgb, var(--danger) 55%, var(--border)); }