/* ══════════════════════════════════════════════════════════════════════════════
   TOP 20 ETF MONITOR — Bloomberg Terminal Aesthetic
   Dark · Mono · Precise · Professional · One-Page No-Scroll
   ══════════════════════════════════════════════════════════════════════════════ */

/* ─── Custom Properties ─────────────────────────────────────────────────────── */
:root {
  /* Core palette */
  --bg-0:        #050608;
  --bg-1:        #0a0c10;
  --bg-2:        #0f1218;
  --bg-3:        #151a22;
  --bg-card:     #0d1117;
  --bg-card-alt: #111620;

  /* Borders */
  --border-dim:    #1e2530;
  --border-mid:    #263040;
  --border-bright: #364558;
  --border-accent: #2a5b8a;

  /* Text */
  --text-0:      #eef2f8;
  --text-1:      #b8c4d4;
  --text-2:      #6b7f96;
  --text-3:      #3d5268;
  --text-label:  #5a7a96;
  --text-mono:   #8cafc8;

  /* Accent / brand */
  --accent:         #0ea5e9;
  --accent-dim:     #0369a1;
  --accent-glow:    rgba(14, 165, 233, 0.15);
  --accent-line:    rgba(14, 165, 233, 0.4);

  /* Status colors */
  --green:          #22c55e;
  --green-dim:      #16a34a;
  --green-bg:       rgba(34, 197, 94, 0.08);
  --green-glow:     rgba(34, 197, 94, 0.2);
  --red:            #ef4444;
  --red-dim:        #dc2626;
  --red-bg:         rgba(239, 68, 68, 0.08);
  --red-glow:       rgba(239, 68, 68, 0.2);
  --yellow:         #f59e0b;
  --yellow-bg:      rgba(245, 158, 11, 0.12);

  /* Typography */
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;
  --font-sans:  'IBM Plex Sans', 'Segoe UI', sans-serif;

  /* Spacing */
  --gap:        1rem;
  --gap-sm:     0.5rem;
  --gap-lg:     1.5rem;
  --radius:     4px;
  --radius-lg:  8px;

  /* Animation */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.7, 0, 0.84, 0);
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
  height: 100%;
}

body {
  background: var(--bg-0);
  color: var(--text-0);
  font-family: var(--font-mono);
  height: 100vh;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ─── Atmospheric Effects ────────────────────────────────────────────────────── */
.scan-lines {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
  opacity: 0.4;
}

.noise-overlay {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ─── Header ─────────────────────────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 0.5rem 1.25rem;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-mid);
  flex-shrink: 0;
  z-index: 100;
  box-shadow:
    0 1px 0 var(--border-dim),
    0 4px 24px rgba(0, 0, 0, 0.5);
}

.app-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(14, 165, 233, 0.03) 0%,
    transparent 30%,
    transparent 70%,
    rgba(14, 165, 233, 0.02) 100%
  );
  pointer-events: none;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex: 0 0 auto;
}

.logo-mark {
  font-size: 1.35rem;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow);
  animation: pulse-logo 4s ease-in-out infinite;
}

@keyframes pulse-logo {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.header-titles {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.app-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-0);
  line-height: 1;
}

.app-subtitle {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--text-label);
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex: 0 0 auto;
}

.market-date {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--text-2);
  font-weight: 400;
}

.market-time {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-shadow: 0 0 12px var(--accent-glow);
  font-variant-numeric: tabular-nums;
}

.header-right {
  flex: 0 0 auto;
}

.status-cluster {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-item {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.status-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-3);
  font-weight: 500;
}

.status-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

.status-value.countdown {
  color: var(--accent);
}

.connection-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border-dim);
  background: var(--bg-2);
  cursor: default;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-3);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.connection-indicator.live .indicator-dot {
  background: var(--green);
  box-shadow: 0 0 6px var(--green-glow), 0 0 12px var(--green-glow);
  animation: blink-live 2s ease-in-out infinite;
}

.connection-indicator.stale .indicator-dot {
  background: var(--yellow);
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.4);
}

.connection-indicator.error .indicator-dot {
  background: var(--red);
  box-shadow: 0 0 6px var(--red-glow);
}

@keyframes blink-live {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.indicator-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-2);
  transition: color 0.3s ease;
}

.connection-indicator.live .indicator-label  { color: var(--green); }
.connection-indicator.stale .indicator-label { color: var(--yellow); }
.connection-indicator.error .indicator-label { color: var(--red); }

/* ─── Ticker Tape ────────────────────────────────────────────────────────────── */
.ticker-tape-wrap {
  overflow: hidden;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border-dim);
  height: 26px;
  position: relative;
  flex-shrink: 0;
}

.ticker-tape-wrap::before,
.ticker-tape-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  z-index: 2;
  pointer-events: none;
}

.ticker-tape-wrap::before {
  left: 0;
  background: linear-gradient(90deg, var(--bg-2), transparent);
}

.ticker-tape-wrap::after {
  right: 0;
  background: linear-gradient(-90deg, var(--bg-2), transparent);
}

.ticker-tape {
  display: flex;
  align-items: center;
  height: 100%;
  white-space: nowrap;
  animation: scroll-tape 40s linear infinite;
  gap: 3rem;
  padding: 0 3rem;
}

@keyframes scroll-tape {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.tape-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--text-1);
  flex-shrink: 0;
}

.tape-symbol {
  color: var(--text-0);
}

.tape-price {
  color: var(--text-mono);
  font-variant-numeric: tabular-nums;
}

.tape-change.up   { color: var(--green); }
.tape-change.down { color: var(--red); }

.tape-divider {
  color: var(--text-3);
  font-size: 0.8rem;
}

/* ─── Controls Bar (interval selector) ──────────────────────────────────────── */
.controls-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.3rem 1.25rem;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-dim);
  flex-shrink: 0;
}

.controls-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--text-3);
  flex-shrink: 0;
}

.interval-selector {
  display: flex;
  align-items: center;
  gap: 4px;
}

.interval-btn {
  background: transparent;
  border: 1px solid var(--border-dim);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 4px 11px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.interval-btn:hover {
  border-color: var(--border-bright);
  color: var(--text-1);
  background: var(--bg-3);
}

.interval-btn.active {
  border-color: var(--accent-dim);
  background: rgba(14, 165, 233, 0.12);
  color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ─── Dashboard Grid ─────────────────────────────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 0.4rem;
  flex: 1;
  min-height: 0;       /* allow grid to shrink inside flex */
  background: var(--bg-0);
  padding: 0.4rem 0.75rem;
  overflow: hidden;
}

@media (max-width: 1400px) {
  .dashboard-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 1100px) {
  .dashboard-grid { grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(5, 1fr); }
}

@media (max-width: 750px) {
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: unset; padding: 0.4rem; gap: 0.35rem; overflow-y: auto; }
}

@media (max-width: 480px) {
  .dashboard-grid { grid-template-columns: 1fr; }
}

/* ─── ETF Card ───────────────────────────────────────────────────────────────── */
.etf-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 0.5rem 0.65rem 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  position: relative;
  overflow: hidden;
  min-height: 0;
  transition:
    border-color 0.25s ease,
    box-shadow 0.25s ease,
    transform 0.15s ease;
  cursor: default;
  animation: card-enter 0.4s var(--ease-out) both;
}

.etf-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 0 1px var(--accent-line), 0 8px 32px rgba(0, 0, 0, 0.6);
  transform: translateY(-2px);
}

.etf-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border-mid);
  transition: background 0.25s ease;
}

.etf-card:hover::before {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.etf-card.flash-up {
  animation: flash-green 0.6s ease-out;
}

.etf-card.flash-down {
  animation: flash-red 0.6s ease-out;
}

@keyframes flash-green {
  0%   { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.4); }
  100% { background: var(--bg-card); border-color: var(--border-dim); }
}

@keyframes flash-red {
  0%   { background: rgba(239, 68, 68, 0.12); border-color: rgba(239, 68, 68, 0.4); }
  100% { background: var(--bg-card); border-color: var(--border-dim); }
}

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

/* Card header */
.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.card-symbols {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.card-ticker {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-0);
  line-height: 1;
}

.card-name {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.card-rank {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-3);
  padding: 2px 5px;
  border: 1px solid var(--border-dim);
  border-radius: 2px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Price block */
.card-price-block {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.card-price {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-0);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s ease;
}

.card-price.loading {
  color: var(--text-3);
}

/* Change indicator */
.card-change {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.change-pct,
.change-abs {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: center;
  gap: 2px;
  line-height: 1;
}

.change-pct.up,  .change-abs.up  { color: var(--green); }
.change-pct.down,.change-abs.down{ color: var(--red); }

.change-arrow {
  font-size: 0.82rem;
}

/* Meta row (volume + trend) */
.card-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.15rem 0;
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  gap: 0.3rem;
}

/* Volume row */
.card-volume-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.vol-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--text-3);
}

.vol-value {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}

/* Trend indicator */
.card-trend {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 3px;
  border: 1px solid var(--border-dim);
  background: var(--bg-3);
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.card-trend.up {
  border-color: rgba(34, 197, 94, 0.3);
  background: rgba(34, 197, 94, 0.06);
}

.card-trend.down {
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.06);
}

.card-trend.flat {
  border-color: var(--border-dim);
}

.trend-icon {
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-mono);
  line-height: 1;
}

.card-trend.up   .trend-icon { color: var(--green); }
.card-trend.down .trend-icon { color: var(--red); }
.card-trend.flat .trend-icon { color: var(--text-3); }

.trend-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.card-trend.up   .trend-label { color: var(--green-dim); }
.card-trend.down .trend-label { color: var(--red-dim); }

/* Sparkline — compact for one-page layout */
.card-sparkline {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 40px;
  margin-top: 1px;
}

.card-sparkline canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.sparkline-label {
  position: absolute;
  top: 4px;
  left: 0;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-3);
  font-weight: 600;
  pointer-events: none;
}

.sparkline-range {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
  font-weight: 400;
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
  padding-bottom: 1px;
}

/* Skeleton loading state */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-3) 25%,
    var(--bg-card-alt) 50%,
    var(--bg-3) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 3px;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 0.3rem 1.25rem;
  background: var(--bg-1);
  border-top: 1px solid var(--border-dim);
  flex-shrink: 0;
}

.footer-source,
.footer-interval {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--text-3);
}

.footer-message {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-2);
  text-align: center;
  min-height: 1em;
  transition: color 0.3s ease;
}

.footer-message.error { color: var(--red); }
.footer-message.warn  { color: var(--yellow); }
.footer-message.ok    { color: var(--green); }

/* ─── Scrollbar ──────────────────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-bright); }

/* ─── Selection ──────────────────────────────────────────────────────────────── */
::selection {
  background: var(--accent-dim);
  color: var(--text-0);
}

/* ─── Responsive tweaks ──────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .header-center { display: none; }
  .app-header    { padding: 0.4rem 0.75rem; }
}

@media (max-width: 640px) {
  .app-title     { font-size: 0.85rem; }
  .status-cluster{ gap: 0.5rem; }
  .card-price    { font-size: 1.05rem; }
  .app-footer    { flex-direction: column; gap: 0.2rem; text-align: center; }
  .footer-left, .footer-right { display: none; }
  .controls-bar  { padding: 0.25rem 0.5rem; gap: 0.4rem; }
}

/* ─── Ensure card-header, price-block fit on one row when tight ────────────── */
@media (min-width: 1024px) {
  .card-price-block {
    flex-wrap: nowrap;
  }
  .card-header {
    gap: 0.3rem;
  }
}