/* DeFi News Kanban — mobile-first dark theme */

:root {
  --bg: #0b0f14;
  --bg-elevated: #121820;
  --bg-card: #161d27;
  --bg-card-hover: #1c2533;
  --border: #243044;
  --border-soft: #1a2332;
  --text: #e8eef7;
  --text-muted: #8b9bb0;
  --text-dim: #6a7a90;
  --accent: #3dd6c6;
  --accent-dim: rgba(61, 214, 198, 0.15);
  --danger: #ff6b7a;
  --danger-dim: rgba(255, 107, 122, 0.12);
  --warn: #f5c542;
  --score: #a78bfa;
  --score-dim: rgba(167, 139, 250, 0.18);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --col-min: min(86vw, 300px);
  --header-h: auto;
  --font: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC",
    "Microsoft JhengHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(61, 214, 198, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(167, 139, 250, 0.05), transparent);
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--accent);
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 15, 20, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0.9rem 1rem 0.85rem;
}

.brand .title {
  margin: 0;
  font-size: clamp(1.15rem, 4vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand .subtitle {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.last-updated {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.last-updated strong {
  color: var(--accent);
  font-weight: 600;
}

.btn-refresh {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-refresh:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.btn-refresh:disabled {
  opacity: 0.5;
  cursor: wait;
}

/* —— Status —— */
.status-banner {
  margin: 0.75rem 1rem 0;
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

.status-banner[data-kind="error"] {
  background: var(--danger-dim);
  border: 1px solid rgba(255, 107, 122, 0.35);
  color: #ffb3bb;
}

.status-banner[data-kind="info"] {
  background: var(--accent-dim);
  border: 1px solid rgba(61, 214, 198, 0.3);
  color: var(--accent);
}

/* —— Board —— */
.board-wrap {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0.75rem 0 1.5rem;
}

.board {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 1rem 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.board::-webkit-scrollbar {
  height: 6px;
}

.board::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* Narrow: stack columns vertically */
@media (max-width: 639px) {
  .board {
    flex-direction: column;
    overflow-x: visible;
    scroll-snap-type: none;
    gap: 1rem;
  }

  .column {
    width: 100%;
    min-width: 0;
    max-height: none;
    scroll-snap-align: none;
  }
}

/* —— Column —— */
.column {
  flex: 0 0 var(--col-min);
  width: var(--col-min);
  min-width: var(--col-min);
  max-height: calc(100dvh - 9rem);
  display: flex;
  flex-direction: column;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  scroll-snap-align: start;
  box-shadow: var(--shadow);
}

.column-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--border-soft);
  border-top: 3px solid var(--col-accent, var(--accent));
  border-radius: var(--radius) var(--radius) 0 0;
}

.column[data-col="breaking"] { --col-accent: #ff6b7a; }
.column[data-col="incentives"] { --col-accent: #a78bfa; }
.column[data-col="protocols"] { --col-accent: #3dd6c6; }
.column[data-col="markets"] { --col-accent: #f5c542; }
.column[data-col="watch"] { --col-accent: #6ea8fe; }

.column-title {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.column-count {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  min-width: 1.5rem;
  text-align: center;
}

.column-body {
  flex: 1;
  overflow-y: auto;
  padding: 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  -webkit-overflow-scrolling: touch;
}

/* —— Card —— */
.card {
  display: block;
  padding: 0.75rem 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: background 0.15s, border-color 0.15s, transform 0.12s;
}

a.card:hover,
a.card:focus-visible {
  background: var(--bg-card-hover);
  border-color: var(--border);
  outline: none;
}

a.card:active {
  transform: scale(0.99);
}

.card-title {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  font-weight: 650;
  line-height: 1.35;
  color: var(--text);
}

.card-summary {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.55rem;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.card-source {
  font-weight: 600;
  color: var(--accent);
}

.card-time::before {
  content: "·";
  margin-right: 0.4rem;
  color: var(--border);
}

.card-score {
  margin-left: auto;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--score);
  background: var(--score-dim);
  padding: 0.12rem 0.4rem;
  border-radius: 6px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.12rem 0.4rem;
  border-radius: 6px;
}

/* —— Empty / skeleton —— */
.empty-state {
  margin: 0.5rem 0;
  padding: 1.25rem 0.75rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
}

.board[aria-busy="true"] .column-body::before {
  content: "載入中…";
  display: block;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 1rem;
}

/* —— Footer —— */
.site-footer {
  text-align: center;
  padding: 0.5rem 1rem 1.5rem;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.site-footer p {
  margin: 0;
}

/* Wide screens: show more of board */
@media (min-width: 1100px) {
  :root {
    --col-min: 260px;
  }

  .column {
    flex: 1 1 0;
    min-width: 220px;
    max-width: 320px;
  }
}