:root {
  --bg: #faf8ff;
  --surface: #ffffff;
  --surface-2: #f0eaff;
  --surface-3: #e8dfff;
  --border: #1a1a1a;
  --text: #1a1a1a;
  --text-muted: #525252;
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-light: #ede9fe;
  --accent-dark: #5b21b6;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #eab308;
  --warning-light: #fef9c3;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --gold: #ca8a04;
  --silver: #737373;
  --bronze: #b45309;
  --radius: 4px;
  --border-width: 2.5px;
  --shadow: 4px 4px 0 var(--border);
  --shadow-sm: 3px 3px 0 var(--border);
  --shadow-lg: 6px 6px 0 var(--border);
  --font: "Space Grotesk", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Cascadia Code", monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle, #d8c4f8 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: var(--border-width) solid var(--border);
  box-shadow: 0 4px 0 var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.brand-icon {
  font-size: 1.5rem;
  background: var(--accent);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 0.15rem 0.35rem;
  box-shadow: var(--shadow-sm);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
}

.header-nav {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
  margin-right: 1rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border: 2px solid transparent;
  border-radius: var(--radius);
}

.nav-link:hover {
  color: var(--accent-dark);
  background: var(--accent-light);
  border-color: var(--border);
}

.nav-link-active {
  color: var(--accent-dark);
  background: var(--accent-light);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nickname-badge {
  background: var(--accent-light);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-dark);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-family: var(--font);
  transition: transform 0.1s, box-shadow 0.1s;
}

.nickname-badge:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow);
}

/* Layout */
.layout {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 1.5rem;
  align-items: start;
}

.main-column { display: flex; flex-direction: column; gap: 1.5rem; }

/* Cards */
.task-card, .submit-card, .waiting-card, .leaderboard-card {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.round-badge {
  background: var(--accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  box-shadow: 2px 2px 0 var(--border);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.live-dot {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--success);
  background: var(--success-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.15rem 0.55rem;
}

.pulse {
  width: 8px;
  height: 8px;
  background: var(--success);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.task-card h1 { font-size: 1.5rem; margin-bottom: 0.75rem; }

.task-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--accent-light);
  border: var(--border-width) solid var(--border);
  border-left: 6px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.categories { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.category-tag {
  background: var(--surface-2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-dark);
  box-shadow: 2px 2px 0 var(--border);
}

/* Waiting */
.waiting-card {
  text-align: center;
  padding: 3rem;
  background: var(--warning-light);
}

.waiting-icon { font-size: 3rem; margin-bottom: 1rem; }
.waiting-card h2 { margin-bottom: 0.5rem; }
.waiting-card p { color: var(--text-muted); font-weight: 500; }

/* Form */
.submit-card h2 { font-size: 1.25rem; margin-bottom: 1rem; }

.form-row { margin-bottom: 1rem; }

.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-row input[type="text"],
.form-row input[type="password"],
.form-row select,
.form-row textarea {
  width: 100%;
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.65rem 0.85rem;
  font-family: var(--font);
  font-size: 0.95rem;
  box-shadow: inset 2px 2px 0 rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.15s, transform 0.15s;
}

.form-row textarea {
  font-family: var(--mono);
  font-size: 0.88rem;
  resize: vertical;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  box-shadow: inset 2px 2px 0 rgba(0, 0, 0, 0.06), 0 0 0 3px var(--accent-light);
  border-color: var(--accent);
}

.hidden { display: none !important; }

/* Buttons */
.btn-primary, .btn-secondary, .btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  border: var(--border-width) solid var(--border);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn-primary {
  background: var(--accent);
  color: white;
  width: 100%;
  margin-top: 0.5rem;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

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

.btn-secondary:hover {
  background: var(--surface-2);
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--border);
}

.btn-sm { padding: 0.45rem 0.85rem; font-size: 0.85rem; }

/* Leaderboard */
.leaderboard-column { position: sticky; top: 88px; }

.leaderboard-card {
  background: var(--surface-2);
}

.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: var(--border-width) solid var(--border);
}

.leaderboard-header h2 { font-size: 1.15rem; }

.leaderboard-count {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-dark);
  background: var(--accent-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.15rem 0.5rem;
}

.leaderboard-table-wrap { overflow-x: auto; }

.leaderboard-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.85rem;
}

.leaderboard-table th {
  text-align: left;
  padding: 0.55rem 0.4rem;
  color: var(--text);
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: var(--border-width) solid var(--border);
  background: var(--surface);
}

.leaderboard-table td {
  padding: 0.6rem 0.4rem;
  border-bottom: 2px solid var(--border);
  vertical-align: middle;
  background: var(--surface);
}

.leaderboard-table tbody tr {
  cursor: pointer;
  transition: transform 0.1s;
}

.leaderboard-table tbody tr:hover td {
  background: var(--accent-light);
}

.leaderboard-table tbody tr:active {
  transform: scale(0.99);
}

.leaderboard-table .rank-col { font-weight: 800; width: 2rem; }
.leaderboard-table .rank-num { font-weight: 800; }

.leaderboard-table .score {
  font-weight: 800;
  color: var(--accent-dark);
  white-space: nowrap;
  background: var(--accent-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.1rem 0.35rem;
  display: inline-block;
}

.scoreboard-link {
  display: block;
  margin-top: 1rem;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-dark);
  text-decoration: none;
  padding: 0.5rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.scoreboard-link:hover {
  background: var(--accent-light);
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow);
}
.leaderboard-table .preview {
  color: var(--text-muted);
  font-style: italic;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-row td {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
  cursor: default;
  font-weight: 600;
}

.rank-gold { color: var(--gold); filter: drop-shadow(1px 1px 0 var(--border)); }
.rank-silver { color: var(--silver); }
.rank-bronze { color: var(--bronze); }

/* Result page */
.result-layout {
  grid-column: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.layout:has(.result-layout) {
  grid-template-columns: 1fr 340px;
}

.back-link {
  color: var(--accent-dark);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  display: inline-block;
  margin-bottom: 0.5rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.3rem 0.65rem;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.back-link:hover {
  background: var(--accent-light);
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow);
}

.result-nickname { color: var(--text-muted); margin-top: 0.25rem; font-weight: 600; }

.prompt-display {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.prompt-display h3 {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.prompt-box {
  font-family: var(--mono);
  font-size: 0.88rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  background: var(--surface-2);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: inset 2px 2px 0 rgba(0, 0, 0, 0.05);
}

.total-score-card {
  background: var(--accent);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
  color: white;
}

.score-label {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.score-value { font-size: 2.75rem; font-weight: 800; }

.eval-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.eval-card {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}

.eval-card.eval-done {
  border-color: var(--border);
  box-shadow: var(--shadow-lg);
  transform: translate(-2px, -2px);
}

.eval-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--surface-2);
  border-bottom: var(--border-width) solid var(--border);
}

.eval-card-header h3 { font-size: 0.95rem; font-weight: 800; }

.eval-status {
  font-size: 0.85rem;
  font-weight: 800;
}

.status-done {
  color: var(--success);
  background: var(--success-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.1rem 0.4rem;
}

.status-error {
  color: var(--danger);
  background: var(--danger-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.1rem 0.4rem;
}

.status-pending { color: var(--text-muted); }

.eval-card-body { padding: 1rem; }

.score-row {
  display: grid;
  grid-template-columns: 90px 1fr 40px;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.score-cat { font-size: 0.8rem; font-weight: 700; color: var(--text); }

.score-bar-wrap {
  height: 10px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.score-bar {
  height: 100%;
  background: var(--accent);
  border-right: 2px solid var(--border);
  transition: width 0.6s ease;
}

.score-num { font-size: 0.8rem; font-weight: 800; text-align: right; }

.score-comment {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-left: 0.25rem;
  font-weight: 500;
}

.overall-comment {
  font-size: 0.85rem;
  border-top: var(--border-width) solid var(--border);
  padding-top: 0.75rem;
  margin-top: 0.5rem;
  color: var(--text);
  font-weight: 500;
}

.error-msg { color: var(--danger); font-size: 0.85rem; font-weight: 600; }

.eval-placeholder { padding: 0.5rem 0; }

.skeleton-line {
  height: 12px;
  background: var(--surface-3);
  border: 2px solid var(--border);
  border-radius: 2px;
  margin-bottom: 0.5rem;
  animation: shimmer 1.5s infinite;
}

.skeleton-line.short { width: 60%; }

@keyframes shimmer {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-dots::after {
  content: '';
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0% { content: ''; }
  25% { content: '.'; }
  50% { content: '..'; }
  75% { content: '...'; }
}

/* Modal */
.modal { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 26, 0.5);
}

.modal-content {
  position: relative;
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 700px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 8px 8px 0 var(--border);
}

.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--danger-light);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--border);
  line-height: 1;
}

.modal-close:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--border);
}

.modal-prompt {
  font-family: var(--mono);
  font-size: 0.88rem;
  background: var(--surface-2);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  white-space: pre-wrap;
  margin: 1rem 0;
  box-shadow: inset 2px 2px 0 rgba(0, 0, 0, 0.05);
}

.modal-eval {
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: var(--surface-2);
  box-shadow: var(--shadow-sm);
}

.modal-eval h4 { margin-bottom: 0.5rem; color: var(--accent-dark); font-weight: 800; }

.modal-content-sm { max-width: 420px; }
.modal-hint { color: var(--text-muted); font-size: 0.85rem; margin: 0.5rem 0 1rem; font-weight: 500; }
.modal-actions { display: flex; gap: 0.75rem; margin-top: 1rem; }
.modal-actions .btn-primary { width: auto; margin-top: 0; flex: 1; }
.modal-actions .btn-secondary { flex: 1; }

/* Scoreboard page */
.layout-scoreboard {
  grid-template-columns: 1fr;
  max-width: 960px;
}

.scoreboard-page {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  grid-column: 1 / -1;
}

.scoreboard-page-header h1 { font-size: 2rem; margin-top: 0.5rem; }
.scoreboard-subtitle { color: var(--text-muted); font-weight: 600; }

.winner-card {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--surface) 100%);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.winner-crown {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.winner-name { font-size: 2rem; margin-bottom: 0.75rem; }

.winner-score-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.winner-score {
  font-size: 1.5rem;
  padding: 0.35rem 0.85rem;
}

.winner-strength { font-weight: 600; color: var(--text-muted); }

.winner-section-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 1.25rem 0 0.5rem;
}

.winner-prompt {
  font-family: var(--mono);
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: inset 2px 2px 0 rgba(0, 0, 0, 0.05);
  max-height: 280px;
  overflow-y: auto;
}

.winner-evals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.winner-eval-card {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.winner-eval-card h4 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: var(--accent-dark);
}

.winner-eval-scores {
  padding-left: 1.2rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.winner-eval-scores li { margin-bottom: 0.35rem; }

.winner-eval-overall {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  border-top: 2px solid var(--border);
  padding-top: 0.5rem;
}

.scoreboard-full-card {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* Admin */
.admin-layout {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.admin-login, .admin-panel {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.admin-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.admin-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--accent-light);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat-value { display: block; font-size: 2.25rem; font-weight: 800; color: var(--accent-dark); }
.stat-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.admin-form, .admin-actions { margin-bottom: 2rem; }
.admin-form h2, .admin-actions h2 { font-size: 1.15rem; margin-bottom: 1rem; }

.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.action-form-full { grid-column: 1 / -1; }

.btn-action {
  width: 100%;
  flex-direction: column;
  align-items: flex-start;
  background: var(--surface);
  color: var(--text);
  padding: 1rem;
  text-align: left;
}

.btn-action:hover {
  background: var(--surface-2);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.btn-action:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

.btn-danger { background: var(--danger-light); }
.btn-danger:hover { background: #fecaca; }

.btn-warning { background: var(--warning-light); }
.btn-warning:hover { background: #fef08a; }

.action-icon { font-size: 1.5rem; margin-bottom: 0.25rem; }
.action-label { font-weight: 800; font-size: 0.95rem; }
.action-desc { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.25rem; font-weight: 500; }

.admin-export {
  margin-bottom: 2rem;
  padding: 1.25rem;
  background: var(--surface-2);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.admin-export h2 { font-size: 1.15rem; margin-bottom: 0.5rem; }

.admin-export-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.admin-export-btn {
  display: inline-flex;
  width: auto;
  margin-top: 0;
  text-decoration: none;
}

.admin-hint {
  background: var(--surface-2);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.admin-hint h3 { margin-bottom: 0.75rem; font-size: 0.95rem; }
.admin-hint ol { padding-left: 1.25rem; color: var(--text-muted); font-size: 0.9rem; }
.admin-hint li { margin-bottom: 0.4rem; }

.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: var(--border-width) solid var(--border);
  box-shadow: var(--shadow-sm);
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
}

/* Responsive */
@media (max-width: 1024px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .leaderboard-column {
    position: static;
    order: -1;
  }

  .eval-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .action-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 0.75rem 1rem; flex-wrap: wrap; gap: 0.5rem; }
  .header-nav { margin-left: 0; order: 3; width: 100%; }
  .layout { padding: 1rem; }
  .brand-name { font-size: 0.95rem; }
  .nickname-badge { margin-left: auto; }
}