/* ══════════════════════════════════════════════════════════════
   AlphaPulse Dashboard — Premium Dark Theme v2
   ══════════════════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  background:#060a14;
  overflow-x:hidden;
}

/* ── Animated Background ── */
body::before{
  content:'';position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(43,166,255,.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(99,102,241,.06) 0%, transparent 50%),
    radial-gradient(ellipse 40% 30% at 10% 80%, rgba(16,185,129,.05) 0%, transparent 50%);
  pointer-events:none;
}
body::after{
  content:'';position:fixed;inset:0;z-index:-1;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size:60px 60px;
  pointer-events:none;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 80%);
}

/* ── Glassmorphism Card ── */
.card{
  background:rgba(15,23,42,.65);
  backdrop-filter:blur(16px) saturate(180%);
  -webkit-backdrop-filter:blur(16px) saturate(180%);
  border:1px solid rgba(255,255,255,.07);
  border-radius:1rem;
  overflow:hidden;
  transition:border-color .3s ease, box-shadow .3s ease, transform .2s ease;
  position:relative;
}
.card::before{
  content:'';position:absolute;inset:0;
  border-radius:1rem;
  background:linear-gradient(135deg, rgba(255,255,255,.03) 0%, transparent 50%);
  pointer-events:none;
}
.card:hover{
  border-color:rgba(43,166,255,.2);
  box-shadow:0 8px 32px rgba(0,0,0,.3), 0 0 0 1px rgba(43,166,255,.1);
  transform:translateY(-1px);
}

.card-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:1rem 1.25rem;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(255,255,255,.02);
}
.card-title{
  display:flex;align-items:center;gap:.5rem;
  font-size:.9rem;font-weight:600;color:#e2e8f0;
  letter-spacing:-.01em;
}

/* ── Stat Card — Glass + Gradient Border ── */
.stat-card{
  position:relative;
  background:rgba(15,23,42,.65);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.07);
  border-radius:1rem;
  padding:1.5rem 1.25rem;
  transition:transform .2s ease, box-shadow .3s ease;
  overflow:hidden;
}
.stat-card::after{
  content:'';position:absolute;top:0;right:0;
  width:80px;height:80px;
  background:radial-gradient(circle, rgba(43,166,255,.08) 0%, transparent 70%);
  pointer-events:none;
}
.stat-card:hover{
  transform:translateY(-3px);
  box-shadow:0 12px 40px rgba(0,0,0,.3);
}

.stat-label{
  font-size:.7rem;color:#64748b;text-transform:uppercase;letter-spacing:.08em;
  margin-bottom:.625rem;font-weight:600;
}
.stat-value{
  font-size:2rem;font-weight:800;
  font-family:'JetBrains Mono','Fira Code',monospace;
  line-height:1;
  background:linear-gradient(135deg, #e2e8f0, #94a3b8);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-value.text-success{
  background:linear-gradient(135deg, #4ade80, #22c55e);
  -webkit-background-clip:text;background-clip:text;
}
.stat-value.text-danger{
  background:linear-gradient(135deg, #f87171, #ef4444);
  -webkit-background-clip:text;background-clip:text;
  filter:drop-shadow(0 0 8px rgba(239,68,68,.3));
}
.stat-value.text-warning{
  background:linear-gradient(135deg, #fbbf24, #f59e0b);
  -webkit-background-clip:text;background-clip:text;
}

/* ── Navigation Tabs ── */
#main-nav{
  display:flex;
  gap:.25rem .125rem;
  flex-wrap:wrap;
  padding-bottom:2px;
  position:relative;
}

.nav-tab{
  display:inline-flex;align-items:center;gap:.375rem;
  padding:.625rem 1rem;
  font-size:.8125rem;font-weight:500;
  color:#64748b;
  border-bottom:2px solid transparent;
  text-decoration:none;
  transition:all .2s ease;
  white-space:nowrap;
  position:relative;
}
.nav-tab:hover{color:#cbd5e1}
.nav-tab.active{
  color:#38bdf8;
  border-bottom-color:#0ea5e9;
}
.nav-tab.active::after{
  content:'';position:absolute;bottom:-1px;left:50%;
  transform:translateX(-50%);
  width:20px;height:3px;
  background:#0ea5e9;
  border-radius:2px;
  filter:blur(4px);
}
.nav-tab svg{flex-shrink:0;opacity:.7}
.nav-tab.active svg{opacity:1}

/* ── Nav 分组色标（左侧细线，悬浮可见，活跃常亮） ── */
.nav-tab::before{
  content:'';
  position:absolute;
  left:.4rem; top:50%;
  width:2px; height:14px;
  border-radius:2px;
  transform:translateY(-50%);
  background:transparent;
  transition:background .2s ease;
}
/* 核心信号组（蓝） */
.nav-tab[data-page="home"]::before,
.nav-tab[data-page="strategy-altcoin"]::before,
.nav-tab[data-page="strategy-btc"]::before{ background:rgba(56,189,248,.45); }
/* 高级分析组（紫） */
.nav-tab[data-page="learning"]::before,
.nav-tab[data-page="prediction"]::before,
.nav-tab[data-page="ml"]::before,
.nav-tab[data-page="backtest"]::before{ background:rgba(168,85,247,.45); }
/* 数据/工具组（青） */
.nav-tab[data-page="social"]::before,
.nav-tab[data-page="onchain"]::before,
.nav-tab[data-page="arbitration"]::before,
.nav-tab[data-page="exchanges"]::before,
.nav-tab[data-page="strategy-market"]::before{ background:rgba(34,211,238,.4); }
/* 交易组（橙） */
.nav-tab[data-page="paper"]::before,
.nav-tab[data-page="live-trading"]::before{ background:rgba(251,146,60,.5); }
/* 系统组（灰） */
.nav-tab[data-page="reports"]::before,
.nav-tab[data-page="system"]::before,
.nav-tab[data-page="guide"]::before{ background:rgba(148,163,184,.35); }
/* 活跃时色标加粗变亮 */
.nav-tab.active::before{ width:3px; height:20px; filter:saturate(1.6) brightness(1.4); }
.nav-tab{ padding-left:1.1rem; }

/* ── 全局 loading skeleton ── */
.skeleton{
  background:linear-gradient(90deg, rgba(255,255,255,.04), rgba(255,255,255,.08), rgba(255,255,255,.04));
  background-size:200% 100%;
  animation:skeleton-shimmer 1.4s ease-in-out infinite;
  border-radius:.375rem;
}
@keyframes skeleton-shimmer{
  0%{ background-position:200% 0; }
  100%{ background-position:-200% 0; }
}

/* ── 数字渐变高亮（用于关键 KPI） ── */
.number-glow{
  background:linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #a78bfa 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 12px rgba(56,189,248,.3));
}

/* ── 演示模式徽章 ── */
.demo-badge{
  display:inline-flex; align-items:center; gap:.25rem;
  font-size:10px; font-weight:600;
  padding:2px 8px; border-radius:9999px;
  background:rgba(251,146,60,.12);
  color:#fb923c;
  border:1px solid rgba(251,146,60,.3);
}

/* Nav badge (signal count) */
.nav-badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:18px;height:18px;padding:0 5px;
  border-radius:9px;
  font-size:.625rem;font-weight:700;
  font-family:'JetBrains Mono',monospace;
  background:linear-gradient(135deg, #0ea5e9, #2563eb);
  color:#fff;
  margin-left:4px;
  animation:badge-pop .3s ease;
}
@keyframes badge-pop{
  0%{transform:scale(0)}
  60%{transform:scale(1.2)}
  100%{transform:scale(1)}
}

/* ── Sub-strategy Tabs ── */
.sub-tab{
  display:inline-flex;align-items:center;gap:.25rem;
  padding:.4rem .875rem;
  font-size:.75rem;font-weight:500;
  color:#64748b;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.06);
  border-radius:.625rem;
  cursor:pointer;
  transition:all .2s ease;
}
.sub-tab:hover{
  background:rgba(255,255,255,.07);
  color:#cbd5e1;
  border-color:rgba(255,255,255,.12);
}
.sub-tab.active{
  background:linear-gradient(135deg, rgba(14,165,233,.15), rgba(37,99,235,.1));
  color:#38bdf8;
  border-color:rgba(14,165,233,.4);
  box-shadow:0 0 12px rgba(14,165,233,.15);
}

/* ── K 线图工具栏（粒度 + 时间范围） ── */
.kline-tf-btn, .kline-range-btn{
  color:#94a3b8;
  background:transparent;
  border:none;
  cursor:pointer;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  transition:background .15s ease,color .15s ease;
}
.kline-tf-btn:hover, .kline-range-btn:hover{
  background:rgba(255,255,255,.05);
  color:#cbd5e1;
}
.kline-tf-btn.active, .kline-range-btn.active{
  background:rgba(14,165,233,.18);
  color:#38bdf8;
}
.kline-tf-btn + .kline-tf-btn,
.kline-range-btn + .kline-range-btn{
  border-left:1px solid rgba(255,255,255,.08);
}

/* ── CME 时区切换按钮 ── */
.cme-tz-btn{
  color:#94a3b8;
  background:transparent;
  border:none;
  cursor:pointer;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  transition:background .15s ease,color .15s ease;
}
.cme-tz-btn:hover{
  background:rgba(255,255,255,.05);
  color:#cbd5e1;
}
.cme-tz-btn.active{
  background:rgba(14,165,233,.18);
  color:#38bdf8;
}
.cme-tz-btn + .cme-tz-btn{
  border-left:1px solid rgba(255,255,255,.08);
}

/* ── Table ── */
table{border-collapse:separate;border-spacing:0}
table thead th{
  position:sticky;top:0;
  background:rgba(15,23,42,.9);
  backdrop-filter:blur(8px);
  z-index:1;
}
table tbody tr{
  transition:background .2s ease;
}
table tbody tr:hover{
  background:rgba(14,165,233,.04);
}
table td{
  padding:.75rem 1rem;color:#cbd5e1;
  border-bottom:1px solid rgba(255,255,255,.03);
}

/* ── Signal Flash Rows ── */
.signal-flash-buy{
  animation:glow-buy 3s ease-in-out infinite;
}
.signal-flash-sell{
  animation:glow-sell 3s ease-in-out infinite;
}
@keyframes glow-buy{
  0%,100%{background:transparent;box-shadow:none}
  50%{background:rgba(234,179,8,.04);box-shadow:inset 3px 0 0 #eab308}
}
@keyframes glow-sell{
  0%,100%{background:transparent;box-shadow:none}
  50%{background:rgba(239,68,68,.04);box-shadow:inset 3px 0 0 #ef4444}
}

/* ── Level Badges — Trading Colors ── */
.badge{
  display:inline-flex;align-items:center;
  padding:.125rem .625rem;border-radius:.375rem;
  font-size:.7rem;font-weight:600;
  white-space:nowrap;letter-spacing:.02em;
}

/* ── Signal Level Badges ── */
.badge-strong-buy{
  background:linear-gradient(135deg, rgba(234,179,8,.2), rgba(251,191,36,.15));
  color:#fde047;
  border:1px solid rgba(234,179,8,.5);
  box-shadow:0 0 12px rgba(234,179,8,.2);
  animation:pulse-gold 2s ease-in-out infinite;
}
.badge-buy{
  background:rgba(34,197,94,.12);color:#86efac;
  border:1px solid rgba(34,197,94,.35);
}
.badge-neutral{
  background:rgba(100,116,139,.12);color:#94a3b8;
  border:1px solid rgba(100,116,139,.25);
}
.badge-sell{
  background:rgba(249,115,22,.12);color:#fdba74;
  border:1px solid rgba(249,115,22,.35);
}
.badge-strong-sell{
  background:linear-gradient(135deg, rgba(239,68,68,.2), rgba(220,38,38,.15));
  color:#fca5a5;
  border:1px solid rgba(239,68,68,.5);
  box-shadow:0 0 12px rgba(239,68,68,.2);
  animation:pulse-red 2s ease-in-out infinite;
}

@keyframes pulse-gold{
  0%,100%{box-shadow:0 0 8px rgba(234,179,8,.15)}
  50%{box-shadow:0 0 20px rgba(234,179,8,.35)}
}
@keyframes pulse-red{
  0%,100%{box-shadow:0 0 8px rgba(239,68,68,.15)}
  50%{box-shadow:0 0 20px rgba(239,68,68,.35)}
}

/* ── Status Dot ── */
.status-dot{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.7rem;font-weight:500;
}
.status-dot::before{
  content:'';display:inline-block;
  width:7px;height:7px;border-radius:50%;
  flex-shrink:0;
}
.status-dot.sent::before{background:#22c55e;box-shadow:0 0 6px rgba(34,197,94,.5)}
.status-dot.pending::before{background:#f59e0b;box-shadow:0 0 6px rgba(245,158,11,.5)}
.status-dot.failed::before{background:#ef4444;box-shadow:0 0 6px rgba(239,68,68,.5)}
.status-dot.expired::before{background:#475569}

/* ── Strategy Progress Bar ── */
.strat-bar-bg{
  height:6px;border-radius:3px;
  background:rgba(255,255,255,.06);
  overflow:hidden;
}
.strat-bar-fill{
  height:100%;border-radius:3px;
  background:linear-gradient(90deg,#0ea5e9,#6366f1);
  transition:width .8s cubic-bezier(.4,0,.2,1);
  position:relative;
}
.strat-bar-fill::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  animation:shimmer 2s infinite;
}
@keyframes shimmer{
  0%{transform:translateX(-100%)}
  100%{transform:translateX(100%)}
}

/* ── Focus Chip ── */
.focus-chip{
  display:flex;align-items:center;justify-content:space-between;
  padding:.625rem .875rem;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.05);
  border-radius:.625rem;
  transition:all .2s ease;
}
.focus-chip:hover{
  background:rgba(14,165,233,.06);
  border-color:rgba(14,165,233,.2);
}

/* ── Toast Notification ── */
.toast-container{
  position:fixed;top:80px;right:20px;
  z-index:9999;
  display:flex;flex-direction:column;gap:8px;
  pointer-events:none;
}
.toast{
  pointer-events:auto;
  min-width:300px;max-width:420px;
  padding:14px 20px;
  background:rgba(15,23,42,.9);
  backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.1);
  border-left:4px solid #0ea5e9;
  border-radius:.75rem;
  box-shadow:0 20px 60px rgba(0,0,0,.5), 0 0 0 1px rgba(255,255,255,.05);
  color:#e2e8f0;font-size:.8125rem;
  transform:translateX(120%);
  transition:transform .4s cubic-bezier(.4,0,.2,1), opacity .3s ease;
  opacity:0;
}
.toast.show{transform:translateX(0);opacity:1}
.toast.hide{transform:translateX(120%);opacity:0}
.toast.toast-buy{border-left-color:#22c55e}
.toast.toast-sell{border-left-color:#ef4444}
.toast.toast-strong{border-left-color:#eab308}

.toast-title{font-weight:700;font-size:.8125rem;margin-bottom:3px;display:flex;align-items:center;gap:6px}
.toast-body{font-size:.75rem;color:#94a3b8;line-clamp:2}
.toast-close{
  position:absolute;top:8px;right:10px;
  background:none;border:none;color:#475569;cursor:pointer;
  font-size:1rem;line-height:1;padding:4px;
  transition:color .15s;
}
.toast-close:hover{color:#e2e8f0}

/* ── Counter Animation ── */
.counter-animate{
  transition:all .6s cubic-bezier(.4,0,.2,1);
}

/* ── Scrollbar ── */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.08);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.15)}

/* ── Page Transition ── */
.page-section{
  animation:page-fade-in .35s ease;
}
@keyframes page-fade-in{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

/* ── Sparkline Container ── */
.sparkline-container{
  width:80px;height:28px;
  display:inline-block;vertical-align:middle;
}

/* ── Chart Container ── */
.chart-container{
  position:relative;
  width:100%;
  padding:1rem 1.25rem 1rem;
}
.chart-container canvas{
  width:100%!important;
  max-height:200px;
}

/* ── Header Premium ── */
.header-glass{
  background:rgba(6,10,20,.75);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid rgba(255,255,255,.06);
}

/* ── Logo Glow ── */
.logo-glow{
  position:relative;
}
.logo-glow::after{
  content:'';position:absolute;inset:-4px;
  border-radius:12px;
  background:linear-gradient(135deg, #0ea5e9, #6366f1);
  opacity:.3;filter:blur(8px);
  z-index:-1;
  animation:logo-pulse 3s ease-in-out infinite;
}
@keyframes logo-pulse{
  0%,100%{opacity:.2;transform:scale(.95)}
  50%{opacity:.4;transform:scale(1.05)}
}

/* ── Health Indicator ── */
.health-indicator{
  display:flex;align-items:center;gap:8px;
  padding:4px 12px;
  border-radius:20px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.06);
  font-size:.75rem;
}
.health-indicator.ok{border-color:rgba(34,197,94,.3)}
.health-indicator.err{border-color:rgba(239,68,68,.3)}

.health-pulse{
  width:8px;height:8px;border-radius:50%;
  position:relative;
}
.health-pulse::before{
  content:'';position:absolute;inset:-3px;
  border-radius:50%;
  animation:health-ring 2s ease-in-out infinite;
}
.health-pulse.ok{background:#22c55e}
.health-pulse.ok::before{border:2px solid rgba(34,197,94,.3)}
.health-pulse.err{background:#ef4444}
.health-pulse.err::before{border:2px solid rgba(239,68,68,.3)}

@keyframes health-ring{
  0%,100%{transform:scale(1);opacity:.6}
  50%{transform:scale(1.5);opacity:0}
}

/* ── Signal Search Box ── */
.signal-search{
  display:flex;align-items:center;gap:8px;
  padding:6px 14px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:.625rem;
  transition:all .2s ease;
}
.signal-search:focus-within{
  border-color:rgba(14,165,233,.4);
  box-shadow:0 0 0 3px rgba(14,165,233,.1);
  background:rgba(255,255,255,.06);
}
.signal-search input{
  background:transparent;border:none;outline:none;
  color:#e2e8f0;font-size:.8125rem;
  width:140px;
  font-family:inherit;
}
.signal-search input::placeholder{color:#475569}
.signal-search svg{color:#475569;flex-shrink:0}

/* ── Empty State ── */
.empty-state{
  display:flex;flex-direction:column;align-items:center;
  padding:3rem 2rem;gap:.75rem;
  color:#334155;
}
.empty-state-icon{
  width:48px;height:48px;
  background:rgba(255,255,255,.03);
  border:1px dashed rgba(255,255,255,.08);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:1.25rem;
  margin-bottom:.25rem;
}
.empty-state-text{font-size:.8125rem;text-align:center}

/* ── Modal Overlay ── */
.modal-overlay{
  position:fixed;inset:0;z-index:9990;
  background:rgba(0,0,0,.7);
  backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;
  animation:modal-fade-in .2s ease;
}
.modal-content{
  background:rgba(15,23,42,.95);
  backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.1);
  border-radius:1rem;
  max-width:900px;width:95%;max-height:85vh;
  overflow-y:auto;
  box-shadow:0 25px 80px rgba(0,0,0,.6);
  animation:modal-slide-up .3s ease;
}
@keyframes modal-fade-in{from{opacity:0}to{opacity:1}}
@keyframes modal-slide-up{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}

.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:1.25rem 1.5rem;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.modal-close{
  background:none;border:none;color:#94a3b8;font-size:1.5rem;cursor:pointer;
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  border-radius:8px;transition:all .15s;
}
.modal-close:hover{background:rgba(255,255,255,.1);color:#e2e8f0}

/* ── Light Theme (U6) ── */
body.light-mode{
  background:#f1f5f9;
  color:#1e293b;
}
body.light-mode::before{
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(43,166,255,.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(99,102,241,.04) 0%, transparent 50%);
}
body.light-mode::after{
  background-image:
    linear-gradient(rgba(0,0,0,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.03) 1px, transparent 1px);
}
body.light-mode .card{
  background:rgba(255,255,255,.8);
  border-color:rgba(0,0,0,.08);
}
body.light-mode .card:hover{
  border-color:rgba(43,166,255,.3);
  box-shadow:0 8px 32px rgba(0,0,0,.1);
}
body.light-mode .card::before{
  background:linear-gradient(135deg, rgba(255,255,255,.5) 0%, transparent 50%);
}
body.light-mode .card-header{
  border-bottom-color:rgba(0,0,0,.06);
  background:rgba(0,0,0,.02);
}
body.light-mode .card-title{color:#1e293b}
body.light-mode .stat-card{
  background:rgba(255,255,255,.85);
  border-color:rgba(0,0,0,.08);
}
body.light-mode .stat-label{color:#64748b}
body.light-mode .stat-value{
  background:linear-gradient(135deg, #1e293b, #475569);
  -webkit-background-clip:text;background-clip:text;
}
body.light-mode .header-glass{
  background:rgba(241,245,249,.85);
  border-bottom-color:rgba(0,0,0,.08);
}
body.light-mode .nav-tab{color:#64748b}
body.light-mode .nav-tab:hover{color:#334155}
body.light-mode .nav-tab.active{color:#0284c7;border-bottom-color:#0284c7}
body.light-mode .sub-tab{
  background:rgba(0,0,0,.04);
  border-color:rgba(0,0,0,.08);
  color:#475569;
}
body.light-mode .sub-tab:hover{background:rgba(0,0,0,.07);color:#1e293b}
body.light-mode .sub-tab.active{
  background:rgba(14,165,233,.1);
  color:#0284c7;
  border-color:rgba(14,165,233,.4);
}
body.light-mode table td{color:#334155;border-bottom-color:rgba(0,0,0,.06)}
body.light-mode table thead th{background:rgba(241,245,249,.95);color:#475569}
body.light-mode table tbody tr:hover{background:rgba(14,165,233,.04)}
body.light-mode .toast{
  background:rgba(255,255,255,.95);
  border-color:rgba(0,0,0,.1);
  color:#1e293b;
}
body.light-mode .toast-body{color:#64748b}
body.light-mode footer{border-top-color:rgba(0,0,0,.08)}
body.light-mode .modal-content{background:rgba(255,255,255,.97);border-color:rgba(0,0,0,.1)}
body.light-mode .modal-header{border-bottom-color:rgba(0,0,0,.08)}
body.light-mode .focus-chip{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.06)}
body.light-mode .gradient-text{
  background:linear-gradient(135deg, #0284c7, #6366f1);
  -webkit-background-clip:text;background-clip:text;
}

/* ── WebSocket Status Indicator ── */
.ws-indicator{
  display:inline-flex;align-items:center;gap:4px;
  font-size:.65rem;color:#64748b;
  padding:2px 8px;border-radius:10px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.06);
}
.ws-dot{
  width:6px;height:6px;border-radius:50%;
  transition:background .3s;
}
.ws-dot.connected{background:#22c55e;box-shadow:0 0 4px rgba(34,197,94,.5)}
.ws-dot.disconnected{background:#ef4444}

/* ── Responsive (U3) ── */
@media(max-width:768px){
  .nav-tab span{display:none}
  .nav-tab{padding:.5rem .5rem;gap:.25rem}
  .nav-tab svg{width:18px;height:18px}
  .stat-value{font-size:1.25rem}
  .stat-card{padding:1rem .875rem}
  .signal-search{display:none}
  .card-header{padding:.75rem 1rem}
  .card-title{font-size:.8rem}
  table td,table th{padding:.5rem .625rem;font-size:.7rem}
  .header-glass .max-w-7xl>div:first-child{height:48px}
  h2.text-2xl{font-size:1.25rem}
  .modal-content{width:98%;max-height:90vh;border-radius:.75rem}
  #main-nav{gap:0;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  #main-nav::-webkit-scrollbar{display:none}
  .logo-glow{width:32px;height:32px;border-radius:8px}
  .logo-glow svg{width:14px;height:14px}
  footer{display:none}
}
/* ── Tablet landscape ── */
@media(max-width:1024px){
  .stat-value{font-size:1.5rem}
  .card-header{padding:.875rem 1rem}
}
@media(max-width:480px){
  main{padding-left:.5rem;padding-right:.5rem}
  .stat-value{font-size:1.1rem}
  .stat-label{font-size:.6rem}
  .nav-tab{padding:.4rem .375rem}
  .card{border-radius:.75rem}
  .stat-card{border-radius:.75rem;padding:.75rem .625rem}
  .toast{min-width:260px;max-width:320px;right:10px}
  .toast-container{right:8px;left:8px}
  .toast{min-width:auto;max-width:100%}
  .modal-content{width:100%;max-height:95vh;border-radius:.5rem .5rem 0 0;margin-top:auto}
  .modal-overlay{align-items:flex-end}
  .chart-container canvas{max-height:150px}
}
/* ── Touch-friendly helpers ── */
@media(hover:none) and (pointer:coarse){
  .nav-tab{min-height:44px;min-width:44px;justify-content:center}
  .sub-tab{min-height:40px;padding:.5rem 1rem}
  button, .btn, [role="button"]{min-height:44px}
  table td, table th{padding:.625rem .75rem}
}
/* ── Safe area (notch devices) ── */
@supports(padding-top:env(safe-area-inset-top)){
  .header-glass{padding-top:env(safe-area-inset-top)}
  main{padding-bottom:env(safe-area-inset-bottom)}
}

/* ── Line Clamp ── */
.line-clamp-2{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

/* ── Utility: Gradient Text ── */
.gradient-text{
  background:linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ── Divider ── */
.divider{
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.06), transparent);
  margin:1.5rem 0;
}

/* ── Exchange Badge ── */
.exchange-badge{
  display:inline-flex;align-items:center;
  padding:.1rem .5rem;border-radius:.25rem;
  font-size:.65rem;font-weight:600;
  letter-spacing:.02em;white-space:nowrap;
  font-family:'JetBrains Mono',monospace;
}
.exchange-badge.binance{
  background:rgba(243,186,47,.12);color:#f3ba2f;
  border:1px solid rgba(243,186,47,.3);
}
.exchange-badge.okx{
  background:rgba(255,255,255,.08);color:#e2e8f0;
  border:1px solid rgba(255,255,255,.15);
}
.exchange-badge.other{
  background:rgba(100,116,139,.1);color:#94a3b8;
  border:1px solid rgba(100,116,139,.2);
}

/* ── Freshness Badge ── */
.freshness{
  display:inline-flex;align-items:center;
  padding:.05rem .4rem;border-radius:.25rem;
  font-size:.6rem;font-weight:700;
  letter-spacing:.03em;
  vertical-align:middle;margin-left:4px;
}
.freshness.fresh{
  background:rgba(34,197,94,.15);color:#4ade80;
  border:1px solid rgba(34,197,94,.4);
  animation:fresh-pulse 1.5s ease-in-out infinite;
}
.freshness.warm{
  background:rgba(251,191,36,.1);color:#fbbf24;
  border:1px solid rgba(251,191,36,.3);
}
.freshness.stale{
  background:rgba(100,116,139,.08);color:#64748b;
  border:1px solid rgba(100,116,139,.15);
}
@keyframes fresh-pulse{
  0%,100%{opacity:1}
  50%{opacity:.6}
}