:root {
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  --bg: #0e1116;
  --bg-elevated: #151a21;
  --bg-card: #1a2029;
  --bg-card-hover: #202836;
  --border: #2a3140;
  --border-strong: #3a4356;
  --text: #e8ecf1;
  --text-dim: #94a1b3;
  --text-faint: #616d80;

  --accent: #6be6c4;
  --accent-strong: #3fd4a8;
  --accent-contrast: #06251d;

  --high: #ff8a70;
  --high-bg: rgba(255, 138, 112, 0.14);
  --medium: #ffcc66;
  --medium-bg: rgba(255, 204, 102, 0.14);
  --low: #8fb4d9;
  --low-bg: rgba(143, 180, 217, 0.14);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-panel: 0 24px 64px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 10px 16px;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 700;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button,
input,
select {
  font-family: inherit;
}

/* Header */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 32px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--text);
}

.brand-tagline {
  margin: 0;
  font-size: 12px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: end;
}

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

.field label {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#search,
#filter,
#statusControl {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 14px;
  min-width: 200px;
}

#filter,
#statusControl {
  min-width: 170px;
}

#search:focus,
#filter:focus,
#statusControl:focus {
  border-color: var(--accent);
}

/* Main / board */

#board-main {
  padding: 20px 32px 64px;
  max-width: 1600px;
  margin: 0 auto;
}

.results-count {
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--text-faint);
}

.board {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  overflow-x: auto;
  padding-bottom: 8px;
}

.board[hidden] {
  display: none;
}

.column {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  flex: 1 1 300px;
  min-width: 280px;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 190px);
}

.column[hidden] {
  display: none;
}

.column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.column-header h2 {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
  color: var(--text);
}

.column[data-status="todo"] .column-header h2 { color: var(--low); }
.column[data-status="in-progress"] .column-header h2 { color: var(--accent); }
.column[data-status="blocked"] .column-header h2 { color: var(--high); }
.column[data-status="done"] .column-header h2 { color: var(--text-dim); }

.column-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 9px;
}

.column-list {
  list-style: none;
  margin: 0;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
}

.column-empty {
  color: var(--text-faint);
  font-size: 13px;
  padding: 8px 4px;
}

.task-card {
  border-radius: var(--radius-md);
}

.task-open {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0;
  cursor: pointer;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.12s ease;
}

.task-open:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.task-open:active {
  transform: translateY(1px);
}

.task-card-inner {
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.pill {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.pill-high { color: var(--high); background: var(--high-bg); }
.pill-medium { color: var(--medium); background: var(--medium-bg); }
.pill-low { color: var(--low); background: var(--low-bg); }

.task-project {
  font-size: 11px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-title {
  font-size: 15px;
  font-weight: 600;
  margin: 0;
  color: var(--text);
  line-height: 1.35;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
}

.avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

.task-due {
  color: var(--text-faint);
  margin-left: auto;
}

.task-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-faint);
}

.task-tags {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Empty state */

.empty-state {
  text-align: center;
  padding: 64px 20px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
}

.empty-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px;
}

.empty-hint {
  color: var(--text-dim);
  margin: 0 0 18px;
  font-size: 14px;
}

.btn {
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
}

.btn:hover {
  background: var(--bg-card-hover);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-strong);
}

/* Detail overlay */

.detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 9, 0.72);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 20px;
  overflow-y: auto;
  z-index: 50;
}

.detail-overlay[hidden] {
  display: none;
}

.detail {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  max-width: 620px;
  width: 100%;
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-panel);
}

.detail-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-close:hover {
  color: var(--text);
  border-color: var(--accent);
}

.detail-project {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
}

.detail-title {
  font-size: 24px;
  margin: 0 0 20px;
  padding-right: 40px;
  line-height: 1.3;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: 0 0 18px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.detail-meta dt {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 0 0 3px;
}

.detail-meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--text);
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 20px;
}

.tag {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 999px;
}

.status-field {
  margin-bottom: 22px;
}

.status-field select {
  max-width: 240px;
}

.status-feedback {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--accent);
  min-height: 18px;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.status-feedback.visible {
  opacity: 1;
  transform: translateY(0);
}

.detail-body {
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
  white-space: pre-line;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

/* Mobile */

@media (max-width: 720px) {
  .site-header {
    padding: 16px 18px;
    flex-direction: column;
    align-items: stretch;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  #search,
  #filter {
    min-width: 0;
    width: 100%;
  }

  #board-main {
    padding: 16px 14px 48px;
  }

  .board {
    flex-direction: column;
    overflow-x: visible;
  }

  .column {
    max-width: none;
    min-width: 0;
    max-height: none;
  }

  .column-list {
    overflow-y: visible;
  }

  .detail-overlay {
    padding: 0;
    align-items: stretch;
  }

  .detail {
    max-width: none;
    width: 100%;
    min-height: 100%;
    border-radius: 0;
    border: none;
    padding: 24px 18px 40px;
  }

  .detail-meta {
    grid-template-columns: 1fr 1fr;
  }
}