:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #e2e4e9;
  --text: #1a1d24;
  --text-dim: #6b7280;
  --accent: #3559e8;
  --accent-dim: #e8ecfd;
  --danger: #d1372f;
  --danger-bg: #fdeceb;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 2px 8px rgba(16, 24, 40, 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body {
  padding: 36px 20px 60px;
}

.stage {
  max-width: 1100px;
  margin: 0 auto;
}

.screen { display: none; }
.screen.active { display: block; animation: fade 0.25s ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

.auth-wrap {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 0;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
}

.card .badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.card h1 {
  font-size: 20px;
  margin: 0 0 6px;
}

.card p.sub {
  margin: 0 0 22px;
  color: var(--text-dim);
  font-size: 13.5px;
}

.field { margin-bottom: 14px; }

.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.field input,
.field textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fbfbfc;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.field textarea {
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical;
  min-height: 64px;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  background: #fff;
}

.field small {
  display: block;
  margin-top: 5px;
  color: var(--text-dim);
  font-size: 11.5px;
}

.btn {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: background 0.15s, transform 0.05s;
}

.btn:hover { background: #2846c9; }
.btn:active { transform: scale(0.99); }
.btn:disabled { opacity: 0.65; cursor: wait; }

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

.btn.secondary:hover {
  background: var(--bg);
  color: var(--text);
}

.error-box,
.warn,
.toast {
  display: none;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13px;
  margin-bottom: 14px;
}

.error-box {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid #f6c6c2;
}

.warn {
  background: #fff8e6;
  color: #8a5a00;
  border: 1px solid #ffe4a3;
  margin-bottom: 16px;
  font-size: 12.5px;
}

.toast {
  background: #eafaf0;
  color: #14804a;
  border: 1px solid #b9ecc9;
  margin: 14px 0 0;
  font-size: 12.5px;
}

.error-box.show,
.warn.show,
.toast.show { display: flex; }

.event-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px 12px 0 0;
  padding: 14px 20px;
}

.event-header .title {
  font-weight: 700;
  font-size: 15px;
}

.event-header .title .live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #d1372f;
  background: #fdeceb;
  padding: 3px 8px;
  border-radius: 999px;
  margin-right: 10px;
}

.event-header .live .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #d1372f;
}

.event-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 0;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 12px 12px;
  overflow: hidden;
  background: var(--card);
}

.player-col {
  background: #0d0f14;
  aspect-ratio: 16 / 9;
  position: relative;
}

.player-col iframe,
.preview-box iframe,
.tools-col iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.tools-col {
  position: relative;
  border-left: 1px solid var(--border);
  min-height: 420px;
  background: var(--card);
}

.tools-col iframe { position: absolute; }

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
}

.panel-header h1 {
  font-size: 16px;
  margin: 0;
}

.panel-body { padding: 22px; }

.current-id {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 16px;
}

.current-id b {
  font-family: ui-monospace, Menlo, Consolas, monospace;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
}

.save-row {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 4px;
}

.save-row .btn { width: auto; padding: 10px 22px; }

.preview-wrap {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.preview-wrap h2 {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 0 0 12px;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 14px;
}

.preview-box {
  position: relative;
  background: #0d0f14;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.preview-box.tools {
  background: var(--bg);
  border: 1px solid var(--border);
  aspect-ratio: auto;
  min-height: 220px;
}

.logout-btn {
  width: auto;
  padding: 8px 16px;
}

.attendance-wrap {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.attendance-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.attendance-header h2 {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 0;
}

.attendance-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.attendance-actions .btn {
  width: auto;
  padding: 8px 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.attendance-sub {
  margin: 0 0 12px;
  color: var(--text-dim);
  font-size: 12.5px;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.attendance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.attendance-table th,
.attendance-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.attendance-table th {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--bg);
}

.attendance-table tbody tr:last-child td {
  border-bottom: none;
}

.attendance-table .empty-row td {
  color: var(--text-dim);
  text-align: center;
  padding: 22px 12px;
}

.status-pill {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
}

.status-pill.watching {
  color: #14804a;
  background: #eafaf0;
}

.status-pill.left {
  color: var(--text-dim);
  background: var(--bg);
}

@media (max-width: 959px) {
  .event-grid { grid-template-columns: 1fr; }
  .tools-col {
    border-left: none;
    border-top: 1px solid var(--border);
    min-height: 460px;
  }
}

@media (max-width: 720px) {
  body { padding: 16px 12px 40px; }
  .settings-grid,
  .preview-grid { grid-template-columns: 1fr; }
  .attendance-header {
    flex-direction: column;
    align-items: flex-start;
  }
}