/* ═══════════════════════════════════════════════════════
   Union Viewer — Dark Theme CSS
   ═══════════════════════════════════════════════════════ */

/* ── Google Font ─────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

/* ── CSS Variables ───────────────────────────────────── */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.8);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --bg-input: rgba(30, 41, 59, 0.6);
  --border: rgba(99, 102, 241, 0.2);
  --border-hover: rgba(99, 102, 241, 0.5);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --cyan: #06b6d4;
  --purple: #a855f7;
  --pink: #ec4899;
  --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --gradient-2: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(168, 85, 247, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Scrollbar ───────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 3px;
}

/* ── Layout ──────────────────────────────────────────── */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header ──────────────────────────────────────────── */
.app-header {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.app-title {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-title .icon {
  font-size: 1.8rem;
  -webkit-text-fill-color: initial;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.header-meta .badge {
  background: var(--accent);
  color: white;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.75rem;
}

/* ── Tabs ────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  overflow-x: auto;
}

.tab-btn {
  flex: 1;
  min-width: 120px;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}

.tab-btn.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Cards ───────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title .icon {
  font-size: 1.2rem;
}

/* ── Stats Grid ──────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Forms ────────────────────────────────────────────── */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-input-group {
  flex: 1;
  min-width: 280px;
  position: relative;
}

.search-input-group .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-input::placeholder {
  color: var(--text-muted);
}

select, .form-select {
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  min-width: 140px;
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

/* ── Table ────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

thead th {
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-secondary);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

thead th:hover {
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.15);
}

thead th .sort-arrow {
  margin-left: 4px;
  opacity: 0.4;
}

thead th.sorted .sort-arrow {
  opacity: 1;
  color: var(--accent);
}

tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(99, 102, 241, 0.08);
  white-space: nowrap;
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background: rgba(99, 102, 241, 0.06);
}

tbody tr.clickable {
  cursor: pointer;
}

.nation-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

.nation-1 { background: rgba(239, 68, 68, 0.15); color: #fca5a5; }
.nation-2 { background: rgba(34, 197, 94, 0.15); color: #86efac; }
.nation-3 { background: rgba(59, 130, 246, 0.15); color: #93c5fd; }
.nation-4 { background: rgba(245, 158, 11, 0.15); color: #fcd34d; }
.nation-5 { background: rgba(168, 85, 247, 0.15); color: #c4b5fd; }
.nation-6 { background: rgba(6, 182, 212, 0.15); color: #67e8f9; }

/* ── Pagination ──────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination .btn {
  min-width: 36px;
  justify-content: center;
}

.pagination .page-info {
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 0 12px;
}

/* ── Chart Container ─────────────────────────────────── */
.chart-container {
  position: relative;
  height: 320px;
  width: 100%;
}

.chart-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 900px) {
  .chart-row {
    grid-template-columns: 1fr;
  }
}

/* ── Union Detail Modal ──────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

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

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 800px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--danger);
}

.modal h2 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  padding-right: 40px;
}

.member-list {
  display: grid;
  gap: 8px;
}

.member-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.member-item:hover {
  border-color: var(--border-hover);
}

.member-item .member-rank {
  color: var(--text-muted);
  font-size: 0.75rem;
  width: 20px;
}

.member-item .member-name {
  font-weight: 500;
  flex: 1;
}

.member-item .member-title {
  color: var(--accent-light);
  font-size: 0.8rem;
}

.member-item .member-id {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: 'Courier New', monospace;
}

/* ── Loading ─────────────────────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-secondary);
  gap: 10px;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Empty State ─────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.9rem;
}

/* ── Player History ──────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 16px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.timeline-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 18px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

.timeline-date {
  color: var(--accent-light);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-union {
  font-weight: 500;
}

.timeline-detail {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 2px;
}

.timeline-sublist {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.timeline-subitem {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(99, 102, 241, 0.12);
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .search-bar {
    flex-direction: column;
  }

  .search-input-group {
    min-width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tab-btn {
    font-size: 0.78rem;
    padding: 8px 12px;
    min-width: 80px;
  }
}

/* ── Filter row ──────────────────────────────────────── */
.filter-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.filter-row label {
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ── Toast ────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  color: var(--text-primary);
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  animation: slideIn 0.3s ease;
  display: none;
}

.toast.show {
  display: block;
}

@keyframes slideIn {
  from { transform: translateX(100px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ── Power growth chart specific ─────────────────────── */
.history-search-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.history-search-row .search-input-group {
  min-width: 200px;
}

.history-chart-container {
  position: relative;
  height: 400px;
  width: 100%;
}

.compact-input {
  max-width: 220px;
  padding: 12px 16px;
}

.status-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid rgba(99, 102, 241, 0.2);
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-secondary);
}

.status-banner.warning {
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}

.status-banner.success {
  border-color: rgba(34, 197, 94, 0.25);
  background: rgba(34, 197, 94, 0.08);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.summary-chip {
  padding: 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.55);
}

.summary-chip .label {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.summary-chip .value {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.diff-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.45);
  padding: 14px;
}

.diff-card h4 {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.rank-delta-up {
  color: var(--success);
  font-weight: 600;
}

.rank-delta-down {
  color: var(--danger);
  font-weight: 600;
}

.rank-delta-same {
  color: var(--text-secondary);
}