/* ═══════════════════════════════════════════════════════
   交易看板 — Design System v5.0
   Three-column layout · Dark theme · CSS Grid
   ═══════════════════════════════════════════════════════ */

/* ===== CSS Variables ===== */
:root {
  /* Background palette */
  --bg-root: #080c14;
  --bg-surface: #0f1520;
  --bg-elevated: #161d2b;
  --bg-overlay: #1c2435;

  /* Border */
  --border-default: #1e293b;
  --border-hover: #334155;
  --border-active: #3b82f6;

  /* Text */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Accent */
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-400: #60a5fa;
  --green-500: #22c55e;
  --green-400: #4ade80;
  --red-500: #ef4444;
  --red-400: #f87171;
  --yellow-500: #f59e0b;
  --yellow-400: #fbbf24;
  --cyan-500: #06b6d4;

  /* Signal colours */
  --bull: #22c55e;
  --bear: #ef4444;
  --warn: #f59e0b;
  --info: #3b82f6;

  /* Sizing */
  --sidebar-width: 240px;
  --right-panel-width: 280px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  /* Shadows */
  --shadow-card: 0 2px 8px rgba(0,0,0,.35);
  --shadow-elevated: 0 4px 20px rgba(0,0,0,.45);

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html { font-size: 15px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-sans);
  background: var(--bg-root);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
::-webkit-scrollbar-corner { background: transparent; }

/* ===== Login Overlay ===== */
#loginOverlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: var(--bg-root);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
}

.login-card {
  text-align: center;
  padding: 48px 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-elevated);
  width: 380px; max-width: 90vw;
}

.login-card h2 { font-size: 26px; margin-bottom: 8px; color: #fff; }
.login-desc { color: var(--text-secondary); font-size: 14px; margin-bottom: 28px; }

.login-card input {
  width: 100%; padding: 13px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary); font-size: 15px;
  margin-bottom: 18px; outline: none;
  transition: border-color .2s;
}
.login-card input:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }

.btn-login {
  width: 100%; padding: 13px;
  background: var(--blue-600);
  border: none; border-radius: var(--radius-md);
  color: #fff; font-size: 15px; font-weight: 600;
  cursor: pointer;
  transition: background .2s, transform .15s;
}
.btn-login:hover { background: var(--blue-500); transform: translateY(-1px); }
.btn-login:active { transform: translateY(0); }

.login-error { color: var(--red-400); font-size: 13px; margin-top: 14px; min-height: 18px; }

/* ===== Header ===== */
header {
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
  border-bottom: 1px solid var(--border-default);
  padding: 16px 0;
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
}

.header-content {
  max-width: 1440px; margin: 0 auto;
  padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}

.header-brand h1 {
  font-size: 20px; font-weight: 700; color: #fff;
  letter-spacing: -0.3px;
}
.header-brand .subtitle {
  font-size: 12px; color: var(--text-muted);
  margin-top: 2px; letter-spacing: 0.5px;
}

.header-controls {
  display: flex; align-items: center; gap: 10px;
}

.date-picker {
  display: flex; gap: 8px; align-items: center;
}

.date-picker input[type="date"] {
  background: var(--bg-overlay);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 13px; outline: none;
  transition: border-color .2s;
}
.date-picker input[type="date"]:focus { border-color: var(--blue-500); }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue-600);
  color: #fff; border: none;
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500;
  cursor: pointer; white-space: nowrap;
  transition: background .2s, transform .1s, box-shadow .2s;
}
.btn:hover { background: var(--blue-500); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

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

.btn-sm { padding: 5px 12px; font-size: 12px; }

/* ===== Three-Column Board Layout ===== */
.board-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--right-panel-width);
  gap: 0;
  max-width: 1440px; margin: 0 auto;
  min-height: calc(100vh - 70px - 48px); /* minus header & depth nav */
  padding: 0;
}

/* ----- Left Panel ----- */
.panel-left {
  background: var(--bg-surface);
  border-right: 1px solid var(--border-default);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 20px;
  overflow-y: auto;
}

.section-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--text-muted);
  margin-bottom: 12px;
}

/* Calendar list */
.calendar-list {
  display: flex; flex-direction: column; gap: 2px;
}

.calendar-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  cursor: pointer; transition: background .15s;
  font-size: 13px; color: var(--text-secondary);
}
.calendar-item:hover { background: var(--bg-overlay); color: var(--text-primary); }
.calendar-item.active {
  background: rgba(59,130,246,.12);
  color: var(--blue-400);
  font-weight: 600;
}
.calendar-item .date-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--border-hover); flex-shrink: 0;
}
.calendar-item.active .date-dot { background: var(--blue-500); box-shadow: 0 0 6px rgba(59,130,246,.5); }

/* Quick Actions */
.quick-actions {
  display: flex; flex-direction: column; gap: 6px;
}

.quick-btn {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px; cursor: pointer;
  transition: all .2s;
  text-align: left;
}
.quick-btn:hover {
  background: var(--bg-overlay);
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateX(2px);
}
.quick-btn:active { background: rgba(59,130,246,.1); border-color: var(--blue-600); }
.quick-btn .btn-icon { font-size: 16px; width: 22px; text-align: center; flex-shrink: 0; }

/* ----- Center Panel ----- */
.panel-center {
  padding: 20px 24px;
  display: flex; flex-direction: column; gap: 18px;
  overflow-y: auto;
}

/* Core Indicators Row */
.core-indicators {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.indicator-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: border-color .2s, transform .15s;
}
.indicator-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.indicator-card .ind-label {
  font-size: 12px; color: var(--text-muted);
  margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}
.indicator-card .ind-value {
  font-size: 28px; font-weight: 700; color: #fff;
  font-family: var(--font-mono);
}
.indicator-card .ind-tag {
  font-size: 11px; margin-top: 6px;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px;
  border-radius: 10px;
}
.ind-tag-warm { background: rgba(245,158,11,.12); color: var(--yellow-400); }
.ind-tag-cool { background: rgba(59,130,246,.12); color: var(--blue-400); }
.ind-tag-bull { background: rgba(34,197,94,.12); color: var(--green-400); }
.ind-tag-bear { background: rgba(239,68,68,.12); color: var(--red-400); }

/* Strategy Cards Row */
.strategy-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.strategy-card {
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-overlay) 100%);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  transition: border-color .2s, transform .15s;
}
.strategy-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.strategy-card .st-label {
  font-size: 12px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.8px;
  margin-bottom: 10px;
}
.strategy-card .st-value {
  font-size: 32px; font-weight: 700; color: #fff;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}
.strategy-card .st-desc {
  font-size: 12px; color: var(--text-secondary);
  line-height: 1.5;
}

/* Timeline */
.timeline-section h3 {
  font-size: 14px; font-weight: 600; color: var(--text-secondary);
  margin-bottom: 14px;
}

.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute; left: 8px; top: 4px; bottom: 4px;
  width: 2px; background: var(--border-default);
}

.timeline-item {
  position: relative;
  padding: 10px 0 10px 20px;
  transition: background .15s;
}

.timeline-item::before {
  content: '';
  position: absolute; left: -18px; top: 16px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-hover);
  border: 2px solid var(--bg-surface);
}

.timeline-time {
  font-size: 12px; color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 2px;
}

.timeline-label {
  font-size: 14px; color: var(--text-primary);
  font-weight: 500;
}

.timeline-desc {
  font-size: 12px; color: var(--text-secondary);
  margin-top: 2px;
}

/* Depth Panel (in center) */
.depth-panel {
  flex: 1;
  min-height: 300px;
}

.depth-panel-content {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.depth-placeholder {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}

/* ----- Right Panel ----- */
.panel-right {
  background: var(--bg-surface);
  border-left: 1px solid var(--border-default);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 14px;
  overflow-y: auto;
}

.data-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: border-color .2s;
}
.data-card:hover { border-color: var(--border-hover); }

.data-card .card-header {
  font-size: 12px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.8px;
  margin-bottom: 10px;
}

.data-card .card-value-lg {
  font-size: 36px; font-weight: 700; color: #fff;
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 4px;
}

.data-card .card-sub {
  font-size: 12px; color: var(--text-secondary);
  margin-bottom: 10px;
}

.data-card .card-chart {
  width: 100%; height: 80px;
}

/* Alert items */
.alert-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 12px;
  background: rgba(239,68,68,.06);
  border: 1px solid rgba(239,68,68,.15);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 12px; color: var(--red-400);
  line-height: 1.5;
}
.alert-item:last-child { margin-bottom: 0; }

.alert-empty {
  text-align: center; padding: 20px 0;
  font-size: 12px; color: var(--text-muted);
}

/* ===== Bottom Depth Nav ===== */
.depth-nav {
  position: sticky; bottom: 0; z-index: 100;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-default);
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 6px 16px;
  overflow-x: auto;
  backdrop-filter: blur(12px);
}

.depth-tab {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  transition: all .2s;
  white-space: nowrap;
}
.depth-tab:hover { color: var(--text-primary); background: var(--bg-overlay); }
.depth-tab.active {
  background: var(--blue-600);
  color: #fff;
  border-color: var(--blue-500);
}

/* ===== Tables (reused in depth panels) ===== */
.table-wrapper {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-default);
}
.table-wrapper table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.table-wrapper th {
  background: var(--bg-overlay);
  padding: 10px 14px; text-align: left;
  font-weight: 600; color: var(--text-muted);
  border-bottom: 1px solid var(--border-default);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
}
.table-wrapper td {
  padding: 10px 14px; border-bottom: 1px solid var(--border-default);
}
.table-wrapper tr:last-child td { border-bottom: none; }
.table-wrapper tr:hover td { background: var(--bg-overlay); }

/* ===== Tags ===== */
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px; border-radius: 10px;
  font-size: 11px; font-weight: 600;
}

.tag-hot { background: rgba(239,68,68,.12); color: #f87171; }
.tag-warm { background: rgba(245,158,11,.12); color: #fbbf24; }
.tag-cool { background: rgba(59,130,246,.12); color: #60a5fa; }
.tag-cold { background: rgba(100,116,139,.12); color: #94a3b8; }
.tag-info { background: rgba(6,182,212,.12); color: #22d3ee; }
.tag-bull { background: rgba(34,197,94,.12); color: #4ade80; }

/* ===== Cards (for depth panel grids) ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }

.card-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: border-color .2s;
}
.card-box:hover { border-color: var(--border-hover); }
.card-box .box-title {
  font-size: 13px; color: var(--text-muted);
  margin-bottom: 10px;
}
.card-box .box-value {
  font-size: 24px; font-weight: 700; color: #fff;
  font-family: var(--font-mono);
}

/* ===== Chart Containers ===== */
.chart-wrap {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 20px;
}
.chart-wrap-sm { height: 220px; }
.chart-wrap-md { height: 380px; }
.chart-wrap-lg { height: 480px; }

/* ===== Loading ===== */
.loading-dots {
  display: flex; align-items: center; justify-content: center;
  padding: 30px; color: var(--text-muted); font-size: 13px;
  gap: 8px;
}
.loading-dots::after {
  content: ''; width: 16px; height: 16px;
  border: 2px solid var(--border-default);
  border-top-color: var(--blue-500);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

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

/* ===== States ===== */
.empty-state {
  text-align: center; padding: 50px 20px;
  color: var(--text-muted); font-size: 13px;
}
.error-state {
  text-align: center; padding: 30px;
  color: var(--red-400); font-size: 13px;
}

/* ===== Utilities ===== */
.text-positive { color: var(--bull); }
.text-negative { color: var(--bear); }
.text-warn { color: var(--warn); }
.text-info { color: var(--info); }
.text-muted { color: var(--text-muted); }

.flex-row { display: flex; align-items: center; gap: 8px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-xs { gap: 6px; }
.gap-sm { gap: 10px; }
.gap-md { gap: 16px; }
.mt-xs { margin-top: 6px; }
.mt-sm { margin-top: 12px; }
.mt-md { margin-top: 20px; }
.mb-sm { margin-bottom: 12px; }

/* Sentiment gauge (mini) */
.mini-gauge {
  position: relative; width: 100%; height: 6px;
  background: linear-gradient(to right, #ef4444, #f59e0b 30%, #22c55e 60%, #3b82f6 85%);
  border-radius: 3px; margin: 14px 0 6px;
}
.mini-gauge-fill {
  position: absolute; top: -2px;
  width: 10px; height: 10px; border-radius: 50%;
  background: #fff; box-shadow: 0 0 6px rgba(255,255,255,.4);
  transform: translateX(-50%);
  transition: left .4s var(--ease-out);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .board-layout {
    grid-template-columns: 200px 1fr 260px;
  }
  :root {
    --sidebar-width: 200px;
    --right-panel-width: 260px;
  }
}

@media (max-width: 992px) {
  .board-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }
  .panel-left { border-right: none; border-bottom: 1px solid var(--border-default); flex-direction: row; flex-wrap: wrap; gap: 12px; }
  .panel-right { border-left: none; border-top: 1px solid var(--border-default); flex-direction: row; flex-wrap: wrap; gap: 12px; padding: 14px; }
  .panel-right .data-card { flex: 1 1 160px; }
  .core-indicators { grid-template-columns: repeat(2, 1fr); }
  .strategy-cards { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  header { padding: 12px 0; }
  .header-content { flex-direction: column; align-items: flex-start; }
  .board-layout { grid-template-columns: 1fr; gap: 0; }
  .panel-left { padding: 12px; flex-direction: column; }
  .panel-center { padding: 14px 12px; }
  .panel-right { padding: 12px; flex-direction: column; }
  .core-indicators { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .indicator-card .ind-value { font-size: 22px; }
  .strategy-cards { grid-template-columns: 1fr; gap: 10px; }
  .strategy-card .st-value { font-size: 26px; }
  .depth-nav { flex-wrap: wrap; justify-content: flex-start; }
  .depth-tab { padding: 6px 14px; font-size: 12px; }
  .data-card .card-value-lg { font-size: 28px; }
}

@media (max-width: 480px) {
  .core-indicators { grid-template-columns: 1fr 1fr; gap: 8px; }
  .indicator-card { padding: 12px 14px; }
  .indicator-card .ind-value { font-size: 20px; }
  .date-picker { flex-direction: column; }
}