:root {
  --bg-deep: #0c0f14;
  --bg-panel: #151a22;
  --bg-panel-alt: #1c232e;
  --bg-input: #10151c;
  --border: #2a333f;
  --border-soft: #232b36;
  --text: #e7edf3;
  --text-muted: #8896a5;
  --accent: #4fa3ff;
  --accent-strong: #2b7de0;
  --green: #3ecf8e;
  --amber: #f1b23e;
  --red: #ef5b5b;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(1200px 600px at 20% -10%, #182130 0%, transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, #14202b 0%, transparent 55%),
    var(--bg-deep);
  color: var(--text);
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.45;
}

.app-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 18px 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(160deg, var(--accent), var(--accent-strong));
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 24px;
  color: #06121f;
  box-shadow: var(--shadow);
}

.brand-text h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.3px;
}

.brand-text p {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

.status-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  font-size: 13px;
  font-weight: 600;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-online .status-dot { background: var(--green); box-shadow: 0 0 8px var(--green); }
.status-offline .status-dot { background: var(--red); box-shadow: 0 0 8px var(--red); }
.status-unknown .status-dot { background: var(--amber); }

.status-online { color: var(--green); }
.status-offline { color: var(--red); }
.status-unknown { color: var(--amber); }

.global-error {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(239, 91, 91, 0.12);
  border: 1px solid rgba(239, 91, 91, 0.4);
  color: #ffb8b8;
  font-weight: 600;
}

.layout {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "identity join"
    "room room";
  gap: 16px;
}

.identity-panel { grid-area: identity; }
.join-panel { grid-area: join; }
.room-panel { grid-area: room; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 16px;
  letter-spacing: 0.3px;
}

.panel h3 {
  font-size: 14px;
  margin: 16px 0 8px;
  color: var(--text);
}

label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin: 10px 0 5px;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

input:focus,
select:focus {
  border-color: var(--accent);
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.row input { flex: 1; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 14px;
  color: var(--text);
  margin-top: 12px;
}

.checkbox-row input {
  width: auto;
}

.button-row {
  margin-top: 16px;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 10px 16px;
  font-weight: 600;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
}

button:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.primary-btn {
  background: linear-gradient(160deg, var(--accent), var(--accent-strong));
  color: #06121f;
}

.primary-btn:hover:not(:disabled) { background: var(--accent); }

.ghost-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.ghost-btn:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--accent);
}

.danger-btn {
  background: rgba(239, 91, 91, 0.14);
  border: 1px solid rgba(239, 91, 91, 0.5);
  color: #ff9d9d;
}

.danger-btn:hover:not(:disabled) { background: rgba(239, 91, 91, 0.24); }

.code-input {
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 700;
}

.public-rooms-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
}

.public-rooms {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 260px;
  overflow-y: auto;
}

.public-rooms li {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 10px 12px;
}

.public-rooms li.muted {
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

.room-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.room-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.room-item-code {
  font-weight: 700;
  letter-spacing: 2px;
}

.room-item-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.conn-pill {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--border);
}

.conn-idle { color: var(--text-muted); }
.conn-connecting { color: var(--amber); border-color: rgba(241, 178, 62, 0.5); }
.conn-connected { color: var(--green); border-color: rgba(62, 207, 142, 0.5); }
.conn-error { color: var(--red); border-color: rgba(239, 91, 91, 0.5); }

.room-empty {
  margin-top: 14px;
  padding: 26px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.room-code-block {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 12px;
  padding: 14px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
}

.label-min {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.room-code {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 5px;
  color: var(--accent);
}

.room-code-block button {
  margin-left: auto;
}

.room-code-block .danger-btn {
  margin-left: 0;
}

.room-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
}

.room-meta b { color: var(--text); }

.count-badge {
  display: inline-block;
  background: var(--accent-strong);
  color: #06121f;
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 12px;
  font-weight: 700;
}

.player-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.player-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 8px 12px;
}

.host-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--amber);
  border: 1px solid rgba(241, 178, 62, 0.5);
  border-radius: 999px;
  padding: 1px 8px;
}

.self-tag {
  font-size: 11px;
  color: var(--accent);
}

.dual-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 8px;
}

.subpanel {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 12px;
}

.log-box {
  height: 200px;
  overflow-y: auto;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 12px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.log-line { word-break: break-word; }
.log-line .log-time { color: var(--text-muted); margin-right: 6px; }
.log-line.log-in .log-from { color: var(--green); }
.log-line.log-out .log-from { color: var(--accent); }
.log-line.log-sys { color: var(--amber); }
.log-line.log-err { color: var(--red); }
.log-line .log-from { font-weight: 700; margin-right: 6px; }

.sync-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 10px;
  align-items: end;
  margin-bottom: 10px;
}

.sync-controls button {
  grid-column: span 1;
}

.footer {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--text-muted);
  font-size: 12px;
  border-top: 1px solid var(--border-soft);
  padding-top: 14px;
}

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

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "identity"
      "join"
      "room";
  }
  .dual-panels {
    grid-template-columns: 1fr;
  }
  .brand-text h1 { font-size: 18px; }
  .room-code { font-size: 22px; letter-spacing: 3px; }
}

@media (max-width: 480px) {
  .app-shell { padding: 14px 12px 32px; }
  .status-cluster { width: 100%; justify-content: space-between; }
  .sync-controls { grid-template-columns: 1fr; }
  .room-code-block { flex-direction: column; align-items: flex-start; }
  .room-code-block button { margin-left: 0; width: 100%; }
}