/* ============================================
 * BRT2 DApp - Dark Theme
 * 深藍黑底 + 螢光綠 + 多色卡片
 * ============================================ */

:root {
  /* 背景色階 */
  --bg-darkest: #0a0e1a;
  --bg-dark: #111827;
  --bg-card: #1a2332;
  --bg-card-hover: #1e293b;
  --bg-input: #0f1623;

  /* 主色 */
  --neon-green: #00ff88;
  --neon-green-dim: #00cc6a;
  --neon-green-glow: rgba(0, 255, 136, 0.15);

  /* 卡片色系 */
  --card-blue: #2563eb;
  --card-blue-bg: rgba(37, 99, 235, 0.12);
  --card-purple: #7c3aed;
  --card-purple-bg: rgba(124, 58, 237, 0.12);
  --card-orange: #ea580c;
  --card-orange-bg: rgba(234, 88, 12, 0.12);
  --card-pink: #db2777;
  --card-pink-bg: rgba(219, 39, 119, 0.12);
  --card-teal: #0d9488;
  --card-teal-bg: rgba(13, 148, 136, 0.12);
  --card-amber: #d97706;
  --card-amber-bg: rgba(217, 119, 6, 0.12);

  /* 文字 */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-bright: #f8fafc;

  /* 邊框 */
  --border: rgba(148, 163, 184, 0.1);
  --border-bright: rgba(0, 255, 136, 0.3);

  /* 圓角 */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 8px;

  /* 陰影 */
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--neon-green-glow);
}

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

body {
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  background: var(--bg-darkest);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============ 頁面容器 ============ */
#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  padding-bottom: 80px;
}

/* ============ 門禁頁 ============ */
#gate-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #0a0e1a 0%, #0d1525 50%, #0a1220 100%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

#gate-screen.hidden {
  display: none;
}

.gate-banner {
  font-size: 42px;
  font-weight: 800;
  color: var(--neon-green);
  background: var(--neon-green-glow);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 14px 32px;
  letter-spacing: 2px;
  line-height: 1.3;
  margin-bottom: 24px;
  white-space: pre-line;
  text-align: center;
}

.gate-banner.en {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 1px;
  white-space: normal;
  border-radius: 999px;
  padding: 8px 22px;
}

/* 超窄屏(如320px)防溢出 */
@media (max-width: 380px) {
  .gate-banner {
    letter-spacing: 1px;
    padding: 14px 18px;
  }
}

.gate-logo {
  font-size: 42px;
  font-weight: 800;
  color: var(--neon-green);
  text-shadow: 0 0 30px var(--neon-green-glow);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.gate-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.gate-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}

.gate-step {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  width: fit-content;
}

.step-badge.step1 { background: var(--card-blue-bg); color: #60a5fa; border: 1px solid rgba(37,99,235,0.3); }
.step-badge.step2 { background: var(--card-purple-bg); color: #a78bfa; border: 1px solid rgba(124,58,237,0.3); }

/* ============ 通用按鈕 ============ */
.btn {
  width: 100%;
  padding: 14px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-green), var(--neon-green-dim));
  color: #001a0e;
  box-shadow: 0 4px 16px var(--neon-green-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 255, 136, 0.25);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

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

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

/* ============ 輸入框 ============ */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.input-field {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-bright);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}

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

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

/* ============ 錢包欄 ============ */
.wallet-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.wallet-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.wallet-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green);
}

.wallet-addr {
  font-family: "SF Mono", monospace;
  color: var(--text-secondary);
}

.lang-switch {
  display: flex;
  background: var(--bg-input);
  border-radius: 8px;
  padding: 2px;
  gap: 0;
}

.lang-btn {
  padding: 4px 12px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  border-radius: 6px;
  font-family: inherit;
  transition: all 0.15s;
}

.lang-btn.active {
  background: var(--card-blue);
  color: white;
}

/* ============ 頁面內容區 ============ */
.page-content {
  padding: 16px;
}

.page-section {
  margin-bottom: 16px;
}

/* ============ 多色卡片 ============ */
.color-card {
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
  margin-bottom: 12px;
}

.color-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  border-radius: 2px 0 0 2px;
}

.cc-green { background: linear-gradient(135deg, rgba(0,255,136,0.08), rgba(0,255,136,0.02)); border: 1px solid rgba(0,255,136,0.15); }
.cc-green::before { background: var(--neon-green); }

.cc-blue { background: var(--card-blue-bg); border: 1px solid rgba(37,99,235,0.2); }
.cc-blue::before { background: var(--card-blue); }

.cc-purple { background: var(--card-purple-bg); border: 1px solid rgba(124,58,237,0.2); }
.cc-purple::before { background: var(--card-purple); }

.cc-orange { background: var(--card-amber-bg); border: 1px solid rgba(217,119,6,0.2); }
.cc-orange::before { background: var(--card-amber); }

.cc-pink { background: var(--card-pink-bg); border: 1px solid rgba(219,39,119,0.2); }
.cc-pink::before { background: var(--card-pink); }

.cc-teal { background: var(--card-teal-bg); border: 1px solid rgba(13,148,136,0.2); }
.cc-teal::before { background: var(--card-teal); }

.card-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(148,163,184,0.06);
}

.card-row:last-child {
  border-bottom: none;
}

.card-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.card-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-bright);
}

.card-value.green {
  color: var(--neon-green);
}

.card-value.orange {
  color: #fb923c;
}

.card-value.big {
  font-size: 24px;
  font-weight: 800;
}

/* ============ 標題 ============ */
.page-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-bright);
}

/* ============ 推薦鏈樹狀圖 ============ */
.chain-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-xs);
  background: var(--bg-input);
  margin-bottom: 4px;
  position: relative;
}

.chain-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: -4px;
  width: 2px;
  height: 4px;
  background: var(--border);
}

.chain-depth {
  font-size: 11px;
  font-weight: 700;
  color: var(--neon-green);
  background: var(--neon-green-glow);
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 36px;
  text-align: center;
}

.chain-addr {
  font-family: "SF Mono", monospace;
  font-size: 13px;
  color: var(--text-secondary);
}

.chain-mint {
  font-size: 12px;
  color: var(--neon-cyan, #00d4ff);
  margin-left: auto;
  white-space: nowrap;
}

.chain-mint + .chain-badge {
  margin-left: 0;
}

.chain-badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
}

.chain-badge.leader {
  background: rgba(0,255,136,0.15);
  color: var(--neon-green);
  font-weight: 600;
}

.chain-badge.you {
  background: var(--card-blue-bg);
  color: #60a5fa;
}

/* ============ 底部導航 ============ */
.contact-line {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 20px;
  padding-bottom: 4px;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  display: flex;
  padding: 8px 0;
  z-index: 100;
  /* 安全区适配 */
  padding-bottom: calc(8px + env(safe-area-inset-bottom));
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px;
  cursor: pointer;
  transition: color 0.15s;
  color: var(--text-muted);
}

.nav-item.active {
  color: var(--neon-green);
}

.nav-item span {
  font-size: 11px;
  font-weight: 500;
}

.nav-icon {
  font-size: 20px;
  line-height: 1;
}

/* ============ Toast ============ */
.toast-container {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 14px;
  box-shadow: var(--shadow);
  margin-bottom: 8px;
  animation: toastIn 0.3s ease;
  max-width: 340px;
  text-align: center;
}

.toast.success { border-color: var(--neon-green); color: var(--neon-green); }
.toast.error { border-color: #ef4444; color: #f87171; }
.toast.info { border-color: var(--card-blue); color: #60a5fa; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Loading ============ */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  gap: 16px;
}

.loading-overlay.hidden {
  display: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--neon-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  font-size: 14px;
  color: var(--text-secondary);
}

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

/* ============ 數值顯示 ============ */
.amount-display {
  font-family: "SF Mono", monospace;
  font-weight: 700;
}

/* ============ 分頁內容控制 ============ */
.tab-page {
  display: none;
}

.tab-page.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

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

/* ============ 快捷金額按鈕 ============ */
.quick-amounts {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.quick-btn {
  flex: 1;
  padding: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.quick-btn:hover, .quick-btn.active {
  border-color: var(--neon-green);
  color: var(--neon-green);
  background: var(--neon-green-glow);
}

/* ============ 狀態標籤 ============ */
.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.status-tag.active { background: var(--neon-green-glow); color: var(--neon-green); }
.status-tag.inactive { background: rgba(100,116,139,0.15); color: var(--text-muted); }

/* ============ 空狀態 ============ */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 14px;
}