:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2b3440;
  --text: #e6edf3;
  --muted: #8b97a7;
  --accent: #4f9cf9;
  --accent-2: #36c08f;
  --danger: #f85149;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #182233 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.6);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  font-size: 30px;
  color: var(--accent-2);
  line-height: 1;
}
.brand h1 { font-size: 17px; margin: 0; letter-spacing: 0.2px; }
.brand .sub { margin: 2px 0 0; font-size: 12px; color: var(--muted); }

.session-info { display: flex; align-items: center; gap: 12px; }
.badge {
  font-size: 12px; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--border);
}
.badge.ok { color: var(--accent-2); border-color: rgba(54,192,143,0.4); }

.view { max-width: 1100px; margin: 0 auto; padding: 28px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

/* ---------- Login ---------- */
.login-card { max-width: 460px; margin: 6vh auto 0; }
.login-card h2 { margin: 0 0 6px; }
.muted { color: var(--muted); font-size: 14px; }
.muted.tiny { font-size: 12px; }

form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="number"], select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }

.advanced { border-top: 1px solid var(--border); padding-top: 10px; }
.advanced summary { cursor: pointer; color: var(--muted); font-size: 13px; user-select: none; }
.advanced[open] summary { margin-bottom: 12px; color: var(--text); }

button {
  font-size: 14px; font-weight: 600; cursor: pointer;
  border-radius: 8px; padding: 10px 16px; border: 1px solid transparent;
  transition: transform .05s ease, background .15s ease, opacity .15s ease;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.primary { background: var(--accent); color: #06121f; }
.primary:hover:not(:disabled) { background: #6cb0ff; }
.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.ghost:hover:not(:disabled) { background: var(--panel-2); }

.error { color: var(--danger); font-size: 13px; margin: 4px 0 0; }

/* ---------- Studio ---------- */
.controls .row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.controls .row + .row { margin-top: 16px; }
.options { color: var(--muted); }
.inline { flex-direction: row; align-items: center; gap: 8px; font-size: 13px; }
.inline.checkbox { gap: 6px; }
.inline input[type="range"] { width: 140px; }
.inline input[type="number"] { width: 64px; }

.file-drop {
  flex: 1;
  min-width: 240px;
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--muted);
  cursor: pointer;
  text-align: center;
  transition: border-color .15s ease, color .15s ease;
}
.file-drop:hover, .file-drop.drag { border-color: var(--accent); color: var(--text); }
.actions { display: flex; gap: 10px; }

.stage { margin-top: 18px; padding: 12px; }
.canvas-wrap {
  position: relative;
  width: 100%;
  min-height: 320px;
  display: flex; align-items: center; justify-content: center;
  background: #05080d;
  border-radius: 8px;
  overflow: hidden;
}
#displayCanvas { max-width: 100%; height: auto; display: block; }
.overlay-hint {
  position: absolute;
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
}

.statusbar { margin-top: 14px; display: flex; align-items: center; padding: 12px 18px; }
.statusbar .spacer { flex: 1; }
.status { font-size: 13px; }
.metrics { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.status.live { color: var(--accent-2); }
.status.err { color: var(--danger); }

/* ---- Mode tabs ---- */
.mode-tabs { display: flex; gap: 10px; margin-bottom: 16px; }
.tab {
  flex: 1; display: flex; flex-direction: column; align-items: flex-start;
  gap: 2px; padding: 12px 16px; border-radius: 12px; cursor: pointer;
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); font-size: 15px; font-weight: 600; text-align: left;
}
.tab:hover { border-color: var(--accent); }
.tab.active { border-color: var(--accent); background: rgba(99,102,241,0.12); }
.tab-sub { font-size: 12px; font-weight: 400; color: var(--muted); }

.mode-panel { display: flex; flex-direction: column; gap: 16px; }

/* ---- Batch progress ---- */
.batch-progress .progress-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px; font-size: 14px;
}
.progress-track {
  width: 100%; height: 10px; border-radius: 6px;
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.progress-bar {
  height: 100%; width: 0%; border-radius: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.4s ease;
}

/* ---- Batch result ---- */
.batch-result h3 { margin: 0 0 12px; }
.batch-result video {
  width: 100%; max-height: 60vh; border-radius: 10px;
  background: #000; display: block; margin-bottom: 12px;
}
.btn-link { display: inline-block; text-decoration: none; text-align: center; }