/* ==========================================================
   0.  Design Tokens
   ========================================================== */

:root {
  --color-bg:      #0d0d0e;
  --color-card:    #161618;
  --color-border:  #252527;
  --color-hover:   #1c1c1f;
  --color-text:    #f0f0f0;
  --color-muted:   #888;
  --color-subtle:  #1a1a1c;
  --radius:        14px;
  --transition:    0.18s ease;
}

:root[data-theme="light"] {
  --color-bg:     #fafafa;
  --color-card:   #ffffff;
  --color-border: #e8e8e8;
  --color-hover:  #f5f5f5;
  --color-text:   #111;
  --color-muted:  #777;
  --color-subtle: #f0f0f0;
}


/* ==========================================================
   1.  Reset & Base
   ========================================================== */

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

body {
  min-height: 100vh;

  background: var(--color-bg);
  color: var(--color-text);

  font-family:
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
  font-size: 15px;
  line-height: 1.65;

  -webkit-font-smoothing: antialiased;

  transition:
    background var(--transition),
    color var(--transition);
}

a {
  color: inherit;
  text-decoration: none;
}


/* ==========================================================
   2.  Layout
   ========================================================== */

.page {
  width: min(900px, calc(100% - 32px));

  margin: 0 auto;
  padding: 48px 0 64px;
}


/* ==========================================================
   3.  Header
   ========================================================== */

.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;

  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.subtitle {
  font-size: 13px;
  color: var(--color-muted);
}


/* ---  Theme Toggle  --- */

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 6px;

  padding: 6px 14px;

  border: 1px solid var(--color-border);
  border-radius: 999px;

  background: transparent;
  color: var(--color-muted);

  font: inherit;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;

  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition);
}

.theme-toggle:hover {
  background: var(--color-hover);
  color: var(--color-text);
  border-color: var(--color-muted);
}

.theme-toggle svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}


/* ==========================================================
   4.  Board (Section Header)
   ========================================================== */

.board {
  margin-top: 28px;
}

.board-head {
  display: flex;
  justify-content: space-between;
  align-items: center;

  margin-bottom: 14px;
}

.board-head h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.board-count {
  font-size: 13px;
  color: var(--color-muted);
}


/* ==========================================================
   5.  Card Grid
   ========================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 12px;
}


/* ==========================================================
   6.  Card Components
   ========================================================== */

/* ---  Card Root  --- */

.card {
  display: flex;
  flex-direction: column;
  gap: 10px;

  padding: 18px 20px;

  border: 1px solid var(--color-border);
  border-radius: var(--radius);

  background: var(--color-card);

  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

.card:hover {
  background: var(--color-hover);
  border-color: var(--color-muted);
  transform: translateY(-1px);
}

/* ---  Card Header  --- */

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
}

.card-badge {
  padding: 2px 9px;

  border: 1px solid var(--color-border);
  border-radius: 999px;

  color: var(--color-muted);
  font-size: 11px;
  white-space: nowrap;
}

/* ---  Card Body  --- */

.card-desc {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 3px 9px;

  border-radius: 999px;

  background: var(--color-subtle);
  color: var(--color-muted);
  font-size: 12px;
}

/* ---  Card Footer  --- */

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;

  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);

  font-size: 12px;
  color: var(--color-muted);
}

.card-url {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-action {
  flex-shrink: 0;
  font-weight: 500;
  color: var(--color-text);
}


/* ==========================================================
   7.  Empty State
   ========================================================== */

.empty-state {
  padding: 40px 24px;

  border: 1px dashed var(--color-border);
  border-radius: var(--radius);

  background: var(--color-subtle);
  text-align: center;
}

.empty-state strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
}

.empty-state p {
  color: var(--color-muted);
  font-size: 13px;
}

.empty-state code {
  color: var(--color-text);
  font-family: Consolas, "SFMono-Regular", monospace;
}


/* ==========================================================
   8.  Footer
   ========================================================== */

.footer {
  margin-top: 32px;
  font-size: 12px;
  color: var(--color-muted);
}


/* ==========================================================
   9.  Responsive
   ========================================================== */

@media (max-width: 640px) {
  .page {
    padding: 28px 0 48px;
  }

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

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