/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-hover: #1e2a4a;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6c6c80;
  --accent: #e94560;
  --accent-hover: #ff5470;
  --accent-light: rgba(233, 69, 96, 0.15);
  --gold: #f5a623;
  --gold-light: rgba(245, 166, 35, 0.15);
  --green: #2ed573;
  --green-light: rgba(46, 213, 115, 0.15);
  --purple: #a55eea;
  --purple-light: rgba(165, 94, 234, 0.15);
  --blue: #4a90d9;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --transition: all 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* ========== Views ========== */
.view { display: none; min-height: 100vh; }
.view.active { display: block; }

/* ========== Login ========== */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  text-align: center;
  box-shadow: var(--shadow);
}

.login-logo { font-size: 56px; margin-bottom: 16px; }
.login-card h1 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.login-subtitle { color: var(--text-secondary); font-size: 14px; margin-bottom: 32px; }

.form-group { margin-bottom: 16px; }

.form-group input,
.form-group select,
.inline-form input,
.inline-form select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  transition: var(--transition);
}

.form-group input:focus,
.inline-form input:focus,
.inline-form select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-hover);
}

.login-hint { color: var(--text-muted); font-size: 12px; margin-top: 20px; }
.error-msg { color: var(--accent); font-size: 14px; margin-top: 8px; min-height: 20px; }

/* ========== Buttons ========== */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-card); }
.btn-danger { background: rgba(233, 69, 96, 0.15); color: var(--accent); }
.btn-danger:hover { background: var(--accent); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-icon { padding: 8px 14px; font-size: 20px; line-height: 1; background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-icon:hover { background: var(--bg-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== Topbar ========== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-left .logo { font-size: 24px; }
.topbar-title { font-size: 18px; font-weight: 700; }

.topbar-right { display: flex; align-items: center; gap: 8px; }

.user-info {
  color: var(--text-secondary);
  font-size: 14px;
  margin-right: 12px;
}

.nav-btn {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
}

.nav-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-btn.active { background: var(--accent-light); color: var(--accent); border-color: var(--accent); }
.nav-btn-danger:hover { background: var(--accent-light); color: var(--accent); }
.hidden { display: none !important; }

/* ========== Content Views ========== */
.content-view { display: none; padding: 24px; max-width: 1200px; margin: 0 auto; }
.content-view.active { display: block; }

/* ========== Calendar ========== */
.calendar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.calendar-header h2 { font-size: 24px; flex: 1; text-align: center; }

.calendar-legend {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
  padding: 0 4px;
}

.legend-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-secondary); }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; }
.legend-dot.has-sessions { background: var(--accent); }
.legend-dot.has-voted { background: var(--green); }
.legend-dot.today { background: var(--gold); }

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.calendar-weekday {
  text-align: center;
  padding: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 14px;
}

.calendar-day {
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.calendar-day:hover { background: var(--bg-hover); border-color: var(--accent); transform: translateY(-2px); }
.calendar-day.empty { background: transparent; border: none; cursor: default; }
.calendar-day.empty:hover { background: transparent; transform: none; }
.calendar-day.today { border-color: var(--gold); border-width: 2px; }

.calendar-day .day-number { font-size: 16px; font-weight: 700; }
.calendar-day .day-sessions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.calendar-day .session-badge {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-light);
  color: var(--accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.calendar-day .voted-indicator {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

/* ========== Modal ========== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 20px;
  overflow-y: auto;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 560px;
  box-shadow: var(--shadow);
}

.modal-large { max-width: 720px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 18px; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}

.modal-close:hover { color: var(--text-primary); }

.modal-body { padding: 24px; max-height: 70vh; overflow-y: auto; }

/* ========== Session Cards ========== */
.session-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
  transition: var(--transition);
}

.session-card:hover { border-color: var(--accent); }

.session-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.session-card-title { font-size: 16px; font-weight: 700; }
.session-card-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }

.session-meta-item {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.tag {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.tag-box { background: var(--blue); color: #fff; }
.tag-city { background: var(--purple); color: #fff; }
.tag-exclusive { background: var(--gold); color: #000; }
.tag-voted { background: var(--green-light); color: var(--green); }
.tag-not-voted { background: var(--accent-light); color: var(--accent); }

.session-card-actions { display: flex; gap: 8px; margin-top: 12px; }

/* ========== Vote Form ========== */
.vote-form { margin-top: 16px; }

.score-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.score-label { width: 100px; font-size: 14px; font-weight: 600; flex-shrink: 0; }

.score-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-hover);
  outline: none;
}

.score-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: var(--transition);
}

.score-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

.score-value {
  width: 40px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--gold);
  flex-shrink: 0;
}

.vote-comment {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  resize: vertical;
  min-height: 80px;
  margin-bottom: 16px;
}

/* ========== Admin ========== */
.admin-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.admin-tab {
  padding: 12px 24px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.admin-tab:hover { color: var(--text-primary); }
.admin-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.admin-panel { display: none; }
.admin-panel.active { display: block; }

.admin-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.admin-section h3 { font-size: 16px; margin-bottom: 16px; }

.inline-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.inline-form input,
.inline-form select {
  flex: 1;
  min-width: 120px;
}

/* ========== Data Table ========== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  text-align: left;
  padding: 12px;
  border-bottom: 2px solid var(--border);
  color: var(--text-secondary);
  font-weight: 600;
  white-space: nowrap;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.data-table tr:hover td { background: var(--bg-hover); }

.data-table .action-btn {
  padding: 4px 10px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  margin-right: 4px;
}

.data-table .action-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.data-table .action-btn.danger:hover { background: var(--accent-light); color: var(--accent); }

.score-cell { font-weight: 700; }
.score-high { color: var(--green); }
.score-mid { color: var(--gold); }
.score-low { color: var(--accent); }
.score-na { color: var(--text-muted); }

/* ========== Stats Display ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.stat-box .stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 4px; }
.stat-box .stat-value { font-size: 24px; font-weight: 700; }

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 300;
  transition: transform 0.3s ease;
  pointer-events: none;
}

.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { border-color: var(--green); }
.toast.error { border-color: var(--accent); }

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .topbar { padding: 0 12px; }
  .topbar-title { display: none; }
  .topbar-right { gap: 4px; }
  .nav-btn { padding: 6px 10px; font-size: 13px; }
  .user-info { font-size: 12px; max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .calendar-grid { gap: 3px; }
  .calendar-day { padding: 4px; }
  .calendar-day .day-number { font-size: 13px; }
  .calendar-day .session-badge { display: none; }
  .content-view { padding: 12px; }
  .inline-form { flex-direction: column; }
  .modal-body { padding: 16px; }
  .data-table { font-size: 12px; }
  .data-table th, .data-table td { padding: 8px 6px; }
}