/* base */
* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --bg: #f7f8f8;
  --panel: #ffffff;
  --panel-2: #f2f4f5;
  --text: #111418;
  --muted: #616c76;
  --border: #dfe3e7;
  --accent: #1f6673;
  --accent-2: #2d7f74;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(17, 20, 24, 0.04);
  --shadow-md: 0 8px 28px rgba(17, 20, 24, 0.06);
  --container: 1160px;
  --ring: rgba(31, 102, 115, 0.38);
  --bg-overlay: rgba(247, 248, 248, 0.88);
  --border-strong: #c9d0d6;
  --accent-soft: rgba(31, 102, 115, 0.14);
  --accent-soft-2: rgba(45, 127, 116, 0.14);
  --up-soft: rgba(19, 135, 74, 0.16);
  --panel-hover: #f5f7f8;
  --up: #13874a;
  --down: #b83232;
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;
  --ease: 180ms cubic-bezier(0.2, 0.75, 0.2, 1);
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #090d11;
  --panel: #0f1419;
  --panel-2: #131a20;
  --text: #e7ecef;
  --muted: #95a0aa;
  --border: #212a32;
  --accent: #6fb4c4;
  --accent-2: #67b9aa;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --ring: rgba(111, 180, 196, 0.48);
  --bg-overlay: rgba(9, 13, 17, 0.88);
  --border-strong: #30404e;
  --accent-soft: rgba(111, 180, 196, 0.22);
  --accent-soft-2: rgba(103, 185, 170, 0.22);
  --up-soft: rgba(54, 179, 112, 0.2);
  --panel-hover: #151d24;
  --up: #36b370;
  --down: #e16b6b;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 8px;
}

/* layout */
.app-shell {
  position: relative;
  overflow-x: clip;
}

.app-container {
  width: min(var(--container), calc(100vw - 32px));
  margin-inline: auto;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
}

.app-header__inner {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  gap: var(--space-16);
  align-items: center;
}

.app-hero {
  padding: var(--space-24) 0 var(--space-16);
}

.app-hero__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-12);
  align-items: center;
}

.app-section {
  padding: var(--space-16) 0;
}

.app-footer {
  margin-top: var(--space-24);
  border-top: 1px solid var(--border);
}

.app-footer__inner {
  padding: var(--space-24) 0 var(--space-32);
  font-size: 12px;
  color: var(--muted);
}

/* components */
.app-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.app-brand__mark {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.app-theme {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  gap: 3px;
}

.app-theme__btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--ease), color var(--ease);
}

.app-theme__btn[aria-checked='true'] {
  background: var(--panel-2);
  color: var(--text);
}

.app-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.app-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 12px;
  min-height: 34px;
}

.app-pill__dot,
.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--up);
  box-shadow: 0 0 0 4px var(--up-soft);
}

.app-hero__actions {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.app-btn {
  position: relative;
  text-decoration: none;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 16px;
  border: 1px solid var(--border);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease), background-color var(--ease);
}

.app-btn::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(120deg, var(--accent-soft), var(--accent-soft-2));
  opacity: 0;
  transition: opacity var(--ease);
  pointer-events: none;
}

.app-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-strong);
}

.app-btn:hover::after {
  opacity: 1;
}

.app-btn--primary {
  background: var(--text);
  color: var(--panel);
  border-color: var(--text);
}

html[data-theme='dark'] .app-btn--primary {
  background: #24303b;
  color: var(--text);
}

.app-btn--ghost {
  background: var(--panel);
  color: var(--text);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.section-title {
  margin: 0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.timestamp {
  font-size: 11px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.app-section__meta {
  opacity: 0.9;
}

.app-section__link {
  text-decoration: none;
}

.grid {
  display: grid;
  gap: var(--space-12);
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.poly-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
  padding: 14px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease), background-color var(--ease);
}

.card:hover,
.poly-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  background: var(--panel-hover);
}

.asset {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
}

.asset-name,
.poly-name {
  font-size: 14px;
  font-weight: 600;
}

.asset-symbol,
.poly-meta,
.poly-row,
.change,
.poly-footer,
.poly-prices,
.poly-countdown,
.status {
  font-size: 11px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.asset-price {
  text-align: right;
}

.price {
  font-size: 14px;
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.up {
  color: var(--up);
}

.down {
  color: var(--down);
}

.skeleton {
  background: var(--border);
  border-radius: 4px;
  height: 1rem;
  width: 3.5rem;
  animation: pulse 1.5s infinite;
}

.poly-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.poly-header,
.poly-row,
.poly-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
}

.poly-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
}

.poly-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--down);
  animation: live-pulse 2.3s ease-in-out infinite;
}

/* utilities */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes live-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.34;
    transform: scale(0.9);
  }
}

@media (max-width: 1024px) {
  .app-header__inner {
    gap: var(--space-8);
    padding: var(--space-12) 0;
  }

  .app-theme {
    width: fit-content;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .app-container {
    width: 100%;
    padding-inline: calc(16px + env(safe-area-inset-left))
      calc(16px + env(safe-area-inset-right));
    box-sizing: border-box;
  }

  .app-hero {
    padding-top: var(--space-24);
  }

  .app-btn {
    width: auto;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .poly-badge::before,
  .skeleton {
    animation: none !important;
  }
}