:root {
  --bg-dark: #0b0f19;
  --bg-surface: #111827;
  --card-bg: #131b2e;
  --card-hover: #1b2640;
  --card-border: #1e293b;
  --card-border-glow: #38bdf8;
  --accent-purple: #9146FF;
  --accent-purple-glow: rgba(145, 70, 255, 0.25);
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 頂部導航 */
.top-nav {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
}

.logo-icon {
  font-size: 1.4rem;
}

.gradient-text {
  background: linear-gradient(135deg, #a855f7 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.4);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-switcher {
  display: flex;
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  overflow: hidden;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn.active, .lang-btn:hover {
  background: var(--card-hover);
  color: var(--text-main);
}

.nav-link-home {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-link-home:hover {
  color: var(--accent-cyan);
}

/* 主容器 */
.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
  flex: 1;
  width: 100%;
}

/* Hero 區域 */
.hero-section {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 700px;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* 按鈕樣式 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #7c3aed 0%, #6366f1 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-emerald {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-emerald:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

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

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

/* KPI 指標卡片 */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.2s, transform 0.2s;
}

.kpi-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-2px);
}

.kpi-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.icon-purple { background: rgba(145, 70, 255, 0.15); }
.icon-green { background: rgba(16, 185, 129, 0.15); }
.icon-amber { background: rgba(245, 158, 11, 0.15); }
.icon-cyan { background: rgba(6, 182, 212, 0.15); }

.kpi-info {
  display: flex;
  flex-direction: column;
}

.kpi-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.kpi-value {
  font-size: 1.45rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.text-emerald { color: var(--accent-emerald); }
.text-amber { color: var(--accent-amber); }
.text-cyan { color: var(--accent-cyan); }

/* 搜尋與過濾欄 */
.filter-bar {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 0.85rem 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  flex: 1;
  min-width: 250px;
}

.search-icon {
  margin-right: 0.5rem;
  opacity: 0.6;
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.85rem;
  width: 100%;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.filter-group select {
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

/* 表格樣式 */
.vault-table-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow-x: auto;
}

.vault-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.vault-table th {
  background: rgba(17, 24, 39, 0.6);
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}

.vault-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(30, 41, 59, 0.6);
  vertical-align: middle;
}

.vault-table tbody tr:hover {
  background: rgba(27, 38, 64, 0.5);
}

/* 代碼框 */
.code-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--card-border);
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-main);
}

.btn-copy {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--accent-cyan);
  font-size: 0.85rem;
  padding: 0.1rem 0.25rem;
  border-radius: 4px;
  transition: all 0.2s;
}

.btn-copy:hover {
  background: rgba(6, 182, 212, 0.2);
  transform: scale(1.1);
}

/* 狀態徽章 */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-twitch {
  background: rgba(145, 70, 255, 0.2);
  color: #bf94ff;
  border: 1px solid rgba(145, 70, 255, 0.4);
}

.badge-steam {
  background: rgba(56, 189, 248, 0.2);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.badge-epic {
  background: rgba(244, 63, 94, 0.2);
  color: #fda4af;
  border: 1px solid rgba(244, 63, 94, 0.4);
}

.badge-unredeemed {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-sold {
  background: rgba(148, 163, 184, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.badge-claimed {
  background: rgba(124, 58, 237, 0.2);
  color: #c4b5fd;
  border: 1px solid rgba(124, 58, 237, 0.3);
}

/* 操作按鈕 */
.action-btn-group {
  display: flex;
  gap: 0.4rem;
}

.action-btn {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  background: var(--card-hover);
  color: var(--text-main);
  border-color: var(--text-muted);
}

.action-btn.active-sold {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.4);
}

/* Modal 彈跳視窗 */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-backdrop.show {
  display: flex;
}

.modal-dialog {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  width: 100%;
  max-width: 500px;
  padding: 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  animation: modalIn 0.2s ease-out;
}

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

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

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

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-group input, .form-group select {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  outline: none;
}

.form-group input:focus, .form-group select:focus {
  border-color: var(--accent-purple);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: rgba(16, 185, 129, 0.9);
  color: #fff;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  border-top-color: var(--accent-cyan);
  animation: spin 0.8s linear infinite;
  margin-right: 0.4rem;
}

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

.text-center { text-align: center; }
.loading-row { padding: 3rem !important; color: var(--text-muted); }

@media (max-width: 768px) {
  .hero-section { flex-direction: column; align-items: stretch; }
  .hero-actions { justify-content: stretch; }
  .hero-actions .btn { flex: 1; }
  .form-row { grid-template-columns: 1fr; }
}