:root {
  --bg: #f4f6f8; --card: #ffffff; --fg: #1b1f24; --muted: #5b6470; --line: #dde1e6;
  --accent: #0b5cad; --accent-fg: #ffffff; --error: #cf222e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1216; --card: #171b21; --fg: #e6e9ed; --muted: #9aa4b1; --line: #2a3038;
          --accent: #58a6ff; --accent-fg: #0f1216; --error: #f85149; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
       padding: env(safe-area-inset-top) 16px 48px; }
header, main { max-width: 900px; margin: 0 auto; }
header h1 { font-size: 1.5rem; margin: 20px 0 4px; }
.sub, .hint { color: var(--muted); font-size: .92rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 16px 0; }
.card h2 { font-size: 1.1rem; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
.num { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
       background: var(--accent); color: var(--accent-fg); font-size: .85rem; }
.hidden { display: none !important; }
input, select { width: 100%; padding: 10px 12px; font: inherit; color: var(--fg); background: var(--bg);
                border: 1px solid var(--line); border-radius: 10px; margin-top: 4px; }
input[type=file] { padding: 8px; }
input[type=range] { padding: 0; flex: 1; margin: 0; }
label { display: block; font-size: .9rem; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 12px 0; }
button, .button { display: inline-block; padding: 10px 16px; font: inherit; border-radius: 10px; cursor: pointer;
                  border: 1px solid var(--line); background: var(--card); color: var(--fg); text-decoration: none; }
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); margin-top: 12px; }
button:disabled { opacity: .6; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab.active, .modetab.active { border-color: var(--accent); color: var(--accent); }
.modetab { padding: 8px 14px; font: inherit; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; }
textarea { width: 100%; padding: 10px 12px; font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; margin-top: 4px; }
.mode-team .solo-only, .mode-solo .team-only { display: none !important; }
.boxes { position: absolute; inset: 0; pointer-events: none; }
.boxes div { position: absolute; border: 2px solid rgba(255, 255, 255, .85); border-radius: 3px; }
.boxes div.t1 { border-color: rgba(120, 190, 255, .9); }
.boxes div.tagged { border-color: #ffd400; border-width: 3px; }
.boxes span { position: absolute; left: -2px; bottom: 100%; background: #ffd400; color: #000; font-size: 11px; line-height: 1.3;
              padding: 0 4px; border-radius: 3px; white-space: nowrap; }
.assign { border: 1px solid var(--accent); border-radius: 10px; padding: 10px 12px; margin: 8px 0; }
.assign-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.assign-list button { padding: 6px 10px; }
details { margin: 12px 0; } summary { cursor: pointer; color: var(--accent); }
.error { color: var(--error); }
.warn { border-left: 4px solid #d29922; padding: 6px 10px; background: var(--bg); border-radius: 6px; }
.progress { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; margin: 12px 0; }
.progress > div { height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.frame-wrap { position: relative; width: 100%; background: #000; border-radius: 10px; overflow: hidden; }
.frame-wrap img { display: block; width: 100%; cursor: crosshair; min-height: 120px; }
.marker { position: absolute; width: 28px; height: 28px; margin: -14px 0 0 -14px; border: 3px solid #ffd400;
          border-radius: 50%; box-shadow: 0 0 0 2px #000; pointer-events: none; }
.scrub { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.scrub button { padding: 8px 10px; font-size: .85rem; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.actions .primary { margin-top: 0; }
iframe { width: 100%; height: 75vh; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.log-box { border: 1px dashed var(--line); border-radius: 10px; padding: 10px 12px; margin: 8px 0 12px; }
.log-box .hint { margin: 6px 0 0; }

.match-list { list-style: none; padding: 0; margin: 8px 0 0; }
.match-list li { border-top: 1px solid var(--line); padding: 10px 0; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }
.match-list .players { flex-basis: 100%; margin: 0; }
.match-list .players a, .match-list .players .link { margin-right: 10px; }

/* sign-in and account */
.topbar { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; }
.topnav { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: baseline; font-size: .95rem; }
.topnav a, .link { color: var(--accent); text-decoration: none; }
.link { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; text-decoration: underline; }
.topnav .link { text-decoration: none; }
#account-bar .link { margin-left: 10px; }
#account-bar .link:first-child { margin-left: 0; }
.narrow { max-width: 460px; margin-left: auto; margin-right: auto; }
.auth-panel form label { margin-bottom: 10px; }
.wide { display: block; width: 100%; margin: 12px 0 8px; }
.card h3 { font-size: 1rem; margin: 18px 0 6px; }
.qr { width: 200px; height: 200px; margin: 8px 0; }
.qr svg { display: block; border-radius: 6px; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; word-break: break-all; }
.plain-list { list-style: none; padding: 0; margin: 0 0 8px; }
.plain-list select { width: auto; margin: 0 4px; padding: 4px 8px; }
.plain-list li { border-top: 1px solid var(--line); padding: 8px 0; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }
.invite { border: 1px solid var(--accent); border-radius: 10px; padding: 10px 12px; }
#account form .button { align-self: end; }

.roles { margin-top: 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; }
.roles .hint { margin: 4px 0 8px; }
.role-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.role-row select { width: auto; flex: 1 1 140px; }
.role-row input { width: auto; flex: 0 1 90px; }