:root {
  --bg: #0f1115;
  --bg-card: #181b21;
  --bg-elev: #20242c;
  --border: #2b2f38;
  --fg: #e7e9ee;
  --muted: #9aa1ad;
  --accent: #7c8cff;
  --accent-strong: #5b6cf0;
  --ok: #5dd6a0;
  --danger: #ff6b6b;
  color-scheme: dark;
}
* { box-sizing: border-box; min-width: 0; }
html, body { max-width: 100vw; overflow-x: hidden; }
body {
  margin: 0;
  background: var(--bg); color: var(--fg);
  font: 15px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}
/* Long strings (URLs, stream keys, ffmpeg output) must wrap, not
   overflow their container. This one rule kills 90% of horizontal-
   scroll bugs on mobile. */
code, pre { overflow-wrap: anywhere; word-break: break-word; }
input, select, textarea, button { max-width: 100%; }
/* Card + main content clip anything that still tries to escape. */
.card, .main, .stack, .field { min-width: 0; }
/* Desktop defaults for nav shells — the @media block below flips these
   at 720px. Kept in one place to prevent cascade confusion. */
.tabbar { display: none; }
.topbar { display: flex; }
a { color: var(--fg); text-decoration: none; }
a:hover { color: var(--accent); }
code, pre { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 13px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.inline { display: inline; }

/* ---- topbar ---- */
.topbar {
  display: flex; align-items: center; gap: 20px;
  padding: 14px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand { font-weight: 700; letter-spacing: -0.01em; font-size: 17px; }
.topbar nav { display: flex; gap: 14px; flex: 1; }
.topbar nav a {
  padding: 5px 10px; border-radius: 6px; color: var(--muted);
  font-size: 14px;
}
.topbar nav a:hover { color: var(--fg); }
.topbar nav a.active { color: var(--accent); background: rgba(124,140,255,0.12); }
.link { background: none; border: none; color: var(--muted); cursor: pointer; font: inherit; }
.link:hover { color: var(--fg); }

/* ---- main / cards ---- */
.main { max-width: 900px; margin: 0 auto; padding: 24px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 22px; margin-bottom: 18px;
}
.card h2 { margin: 0 0 12px; font-size: 17px; letter-spacing: -0.01em; }
.card p { margin: 0 0 12px; }

/* ---- forms ---- */
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field > span { font-size: 12px; color: var(--muted); font-weight: 500;
                text-transform: uppercase; letter-spacing: 0.04em; }
input[type="text"], input[type="password"], select {
  background: var(--bg-elev);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 12px; color: var(--fg); font: inherit; width: 100%;
}
input[readonly] { background: var(--bg); color: var(--muted); }
input:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,140,255,0.2);
}
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-elev); border: 1px solid var(--border);
  color: var(--fg); border-radius: 8px; padding: 8px 16px;
  font: inherit; font-weight: 500; cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent-strong); border-color: var(--accent-strong); color: white; }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); }
.btn-sm { padding: 4px 10px; font-size: 12px; }

.banner {
  padding: 10px 14px; border-radius: 8px; margin-bottom: 12px;
  border: 1px solid var(--border);
}
.banner.err { color: var(--danger); border-color: rgba(255,107,107,0.4);
              background: rgba(255,107,107,0.08); }
.banner.ok  { color: var(--ok);      border-color: rgba(93,214,160,0.4);
              background: rgba(93,214,160,0.08); }

/* Account form helpers */
.divider { border: none; border-top: 1px solid var(--border); margin: 4px 0; }
.field .req  { color: var(--danger); font-style: normal; font-size: 11px; margin-left: 4px; }
.field .hint { color: var(--muted); font-style: normal; font-size: 11px; margin-left: 4px;
               text-transform: none; letter-spacing: 0; }

/* Two-column form grid for compact settings (used on /settings). */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

/* Splash-image preview on Settings. Contained aspect ratio, subtle
   frame; caps at 500px wide so it doesn't hog the page. */
.splash-preview {
  margin: 8px 0 14px;
  max-width: 500px;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
}
.splash-img { display: block; width: 100%; height: 100%; object-fit: contain; }

/* Danger-zone reveal on Settings — HTML-only "are you sure" pattern.
   The <details>/<summary> means the user has to expand it before the
   destructive button becomes reachable. No JS alert() involved. */
.danger-zone {
  margin-top: 14px; padding: 10px 12px;
  background: rgba(255,107,107,0.05);
  border: 1px solid rgba(255,107,107,0.3);
  border-radius: 8px;
}
.danger-zone summary {
  cursor: pointer; color: var(--danger); font-weight: 600;
  user-select: none;
}
.danger-zone p { margin: 10px 0; }
.btn-danger {
  background: transparent; border-color: rgba(255,107,107,0.5);
  color: var(--danger);
}
.btn-danger:hover { background: var(--danger); color: white; border-color: var(--danger); }

/* ===== Mobile layer (below 720px, targeting iPhone 15/16/17 Pro) =====
   Top bar is HIDDEN entirely on mobile — the bottom tab bar is the
   only nav. Log out lives on the Account page. Everything hugs the
   viewport edges and wraps aggressively; horizontal scroll is banned. */

.nav-desktop { display: flex; gap: 14px; flex: 1; }

@media (max-width: 720px) {
  /* --- Nav swap: hide topbar entirely, show bottom tabbar. --- */
  .topbar { display: none; }
  .tabbar { display: flex; }

  /* --- Main content: hug the edges; leave room for the tabbar. --- */
  .main {
    padding: 14px 12px;
    padding-top: max(14px, env(safe-area-inset-top, 14px));
    padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px));
    max-width: 100vw;
  }
  .card {
    padding: 14px 14px;
    margin-bottom: 12px;
    border-radius: 12px;
    max-width: 100%;
  }
  .card h2 { font-size: 16px; margin-bottom: 8px; }
  .card p  { font-size: 13.5px; }

  /* --- Form inputs: 16px font kills iOS zoom-on-focus. --- */
  input[type="text"], input[type="password"], select {
    font-size: 16px;
    padding: 12px 14px;
    border-radius: 10px;
    width: 100%;
  }
  .field > span { font-size: 11.5px; }
  .stack { gap: 10px; }
  .row   { gap: 8px; flex-wrap: wrap; }
  .btn {
    padding: 12px 18px; font-size: 15px; border-radius: 10px;
    min-height: 44px;
  }
  .btn-sm { padding: 8px 12px; font-size: 13px; }
  hr.divider { margin: 8px 0; }

  /* --- Long values wrap. Broadly applied so any code element
         (URLs, stream keys, ffmpeg output) always fits. --- */
  code, pre, dd { overflow-wrap: anywhere; word-break: break-word; }

  /* --- Control-page kv list: stacks label above value. --- */
  dl.kv { grid-template-columns: 1fr; gap: 4px 0; margin: 0; }
  dl.kv dt {
    margin-top: 10px; font-size: 11.5px;
    text-transform: uppercase; letter-spacing: 0.04em;
  }
  dl.kv dt:first-child { margin-top: 0; }
  dl.kv dd { padding-left: 0; margin: 0; }
  dl.kv dd .btn-sm { margin-left: 0; margin-top: 6px; }

  /* --- QR page: single column, textboxes card FIRST, QR BELOW. --- */
  .qr-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "form" "qr";
    gap: 14px;
  }
  .qr-preview { grid-area: qr; }
  .qr-page form { grid-area: form; }
  /* Cap the QR at a comfortable hold-up-to-camera size. */
  .qr-out { max-width: 320px; margin: 0 auto; }

  /* --- Login card: edge-hugging on mobile. --- */
  .login-wrap { margin: 24px 0; padding: 22px 18px; border-radius: 12px; max-width: 100%; }

  /* --- Live status header wraps. --- */
  .live-header { flex-wrap: wrap; }
  #uptime { flex-basis: 100%; margin-left: 0 !important; }

  /* Stats grid stacks one column per phone screen. */
  .stats-grid { grid-template-columns: 1fr; gap: 14px; }

  /* --- ffmpeg tail. --- */
  .ffmpeg-diag pre { font-size: 11px; max-height: 180px; padding: 8px 10px; }

  /* --- Bottom tab bar positioning (visibility is set above). --- */
  .tabbar {
    position: fixed; left: 0; right: 0; bottom: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    z-index: 20;
  }
  .tabbar .tab {
    flex: 1; text-align: center;
    padding: 10px 4px 8px;
    color: var(--muted);
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    font-size: 11px; line-height: 1;
    min-height: 56px;
    text-decoration: none;
  }
  .tabbar .tab-ic { font-size: 20px; line-height: 1; }
  .tabbar .tab-l  { font-size: 10.5px; letter-spacing: 0.02em; }
  .tabbar .tab.active { color: var(--accent); }
  .tabbar .tab:active { background: var(--bg-elev); }
}

/* ---- login ---- */
.login-wrap {
  max-width: 360px; margin: 60px auto; padding: 20px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
}
.login-wrap h1 { margin: 0 0 4px; }

/* ---- live status ---- */
.live-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.live-header h2 { margin: 0; }
.badge {
  padding: 3px 9px; border-radius: 999px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.05em;
}
.badge.on  { background: rgba(93,214,160,0.18); color: var(--ok);      border: 1px solid rgba(93,214,160,0.35); }
.badge.off { background: rgba(154,161,173,0.12); color: var(--muted); border: 1px solid var(--border); }

dl.kv { display: grid; grid-template-columns: 200px 1fr; gap: 6px 14px; margin: 0; }
dl.kv dt { color: var(--muted); font-size: 13px; align-self: center; }
dl.kv dd { margin: 0; word-break: break-all; align-self: center; }
dl.kv dd .btn-sm { margin-left: 6px; }

.ffmpeg-diag { margin-top: 14px; }
.ffmpeg-diag pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; max-height: 220px; overflow: auto; white-space: pre-wrap;
}

/* Two-column grid of live stats on the Control page. Stacks on mobile
   via the media block further down. */
.stats-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin: 14px 0 4px;
}
.stats-col { min-width: 0; }
.stats-h {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted); margin-bottom: 6px;
}
dl.stats {
  display: grid; grid-template-columns: auto 1fr; gap: 4px 12px;
  margin: 0; font-size: 13px;
}
dl.stats dt { color: var(--muted); }
dl.stats dd { margin: 0; word-break: break-all; }
dl.stats .mono { font-family: ui-monospace, monospace; font-size: 12px; }
dl.stats .unit { color: var(--muted); font-size: 11px; }
.pill {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.03em;
  border: 1px solid var(--border);
}
.pill.on  { background: rgba(93,214,160,0.14); color: var(--ok);
            border-color: rgba(93,214,160,0.35); }
.pill.off { background: var(--bg-elev); color: var(--muted); }

/* Tiny connection dot in the live-status header. Pulses green when
   the last poll succeeded within 5s; dim red when polls are failing
   or stalled. This is the "is the live-update actually live?" answer. */
.conn-dot {
  display: inline-flex; align-items: center; justify-content: center;
  width: 12px; height: 12px; margin-left: 8px;
  font-size: 10px; line-height: 1;
}
.conn-dot.on  { color: var(--ok);      animation: conn-pulse 2s ease-in-out infinite; }
.conn-dot.off { color: var(--danger);  opacity: 0.6; }
@keyframes conn-pulse {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 1; }
}

/* Start/Stop + Preview button row on the Control page. Normal-size
   buttons, wrapped to allow "Preview" to sit alongside the primary. */
.stream-controls {
  display: flex; gap: 8px; align-items: center; margin-top: 12px;
  flex-wrap: wrap;
}

/* Preview modal — two panels (camera input + GameChanger output). */
.preview-modal[open] {
  border: none; padding: 0; background: transparent;
  max-width: 96vw; max-height: 94vh;
  display: flex; flex-direction: column; gap: 10px;
}
.preview-modal::backdrop { background: rgba(0,0,0,0.75); }
.preview-grid {
  background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 12px;
  display: grid; gap: 12px;
  grid-template-columns: 1fr 1fr;
  max-width: 96vw;
}
.preview-panel { margin: 0; display: flex; flex-direction: column; gap: 6px; }
.preview-panel figcaption { font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.preview-panel figcaption .muted { text-transform: none; letter-spacing: 0;
  font-weight: 400; margin-left: 4px; }
.preview-slot {
  position: relative;
  background: #000; border-radius: 8px; overflow: hidden;
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
}
.preview-slot img,
.preview-slot video {
  display: block; width: 100%; height: 100%; object-fit: contain;
  background: #000;
}
.preview-empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 13px;
}
.preview-close-wrap { display: flex; justify-content: center; }
.preview-close-wrap .btn { min-width: 120px; }

@media (max-width: 720px) {
  .preview-grid { grid-template-columns: 1fr; }
  .preview-modal[open] { max-width: 100vw; }
}

/* ---- Recent events list ----
   Each event is a card-like row: kind chip on the left, timestamp on
   the right, detail spans the full width below. No horizontal fight
   between three columns — everything reads top-to-bottom on any
   screen size. */
.events { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.events li {
  padding: 10px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
}
.events li.muted { background: transparent; }
.events .ev-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 2px;
}
.events .kind {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 999px;
  background: rgba(124,140,255,0.14); color: var(--accent);
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; white-space: nowrap;
  border: 1px solid rgba(124,140,255,0.3);
}
/* Kind-specific tints for at-a-glance scanning. */
.events .kind[data-kind^="ffmpeg_error"],
.events .kind[data-kind="publish_denied"] {
  background: rgba(255,107,107,0.14); color: var(--danger);
  border-color: rgba(255,107,107,0.35);
}
.events .kind[data-kind="publish_start"],
.events .kind[data-kind="ffmpeg_start"] {
  background: rgba(93,214,160,0.14); color: var(--ok);
  border-color: rgba(93,214,160,0.35);
}
.events time {
  color: var(--muted); font-family: ui-monospace, monospace;
  font-size: 11.5px; white-space: nowrap;
}
.events .detail { color: var(--fg); word-break: break-word; }
.events .detail:empty { display: none; }

/* ---- QR page ---- */
.qr-grid {
  display: grid; grid-template-columns: 1fr 320px; gap: 24px;
  grid-template-areas: "form qr";
  align-items: start;
}
.qr-page form { grid-area: form; }
.qr-preview { grid-area: qr; }
.qr-preview { text-align: center; }
.qr-out {
  background: white; padding: 12px; border-radius: 12px;
  border: 1px solid var(--border);
  display: block; width: 100%; aspect-ratio: 1 / 1;
}
.qr-out svg { display: block; }
.qr-preview pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px; margin-top: 6px; font-size: 11px; text-align: left;
  overflow: auto; word-break: break-all; white-space: pre-wrap; max-height: 140px;
}