/* NoJS Playground — Minimal-Class Dark Theme
 *
 * Sensible defaults for semantic HTML.
 * Layout scopes via data-layout attribute.
 *
 *  1. Theme Variables
 *  2. Reset & Scrollbar
 *  3. Base Typography
 *  4. Layout Scopes
 *  5. Board Layout (Kanban)
 *  6. Form Elements (generic)
 */


/* 1. Theme Variables ––––––––––––––––––––––––––––––––––– */

:root {
  color-scheme: dark;

  --bg:           #0a0c10;
  --surface:      #0d0f14;
  --card:         #1a1d2e;
  --card-hover:   #1e2133;

  --border:       rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.1);
  --border-dashed: rgba(255,255,255,0.1);

  --text:         #e2e8f0;
  --text-heading: #f1f5f9;
  --text-sec:     #94a3b8;
  --text-muted:   #64748b;
  --text-dim:     #475569;

  --accent:       #0ea5e9;
  --accent-hover: #0284c7;
  --accent-light: #38bdf8;
  --accent-bg:    rgba(14,165,233,0.1);
  --accent-bg3:   rgba(14,165,233,0.05);
  --accent-bg4:   rgba(14,165,233,0.15);

  --danger:       #f87171;
  --danger-bg:    rgba(239,68,68,0.1);
  --danger-bg2:   rgba(239,68,68,0.15);

  --purple:       #c084fc;
  --purple-bg:    rgba(168,85,247,0.15);
  --orange:       #fb923c;
  --orange-bg:    rgba(249,115,22,0.15);

  --radius:       8px;
  --radius-lg:    12px;
  --radius-full:  9999px;
}


/* 2. Reset & Scrollbar –––––––––––––––––––––––––––––––– */

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

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }


/* 3. Base Typography –––––––––––––––––––––––––––––––––– */

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  line-height: 1.4;
  margin: 0;
}

h1 { font-size: 18px; font-weight: 700; color: var(--text-heading); }
h2 { font-size: 16px; font-weight: 700; color: var(--text-heading); margin: 0; }
h3 { font-size: 14px; font-weight: 600; color: var(--text-heading); margin: 0; }
h4 { font-size: 13px; font-weight: 600; color: var(--text-heading); }

strong { font-weight: 600; color: var(--text); display: block; }
small  { font-size: 12px; color: var(--text-muted); display: block; }
time   { font-size: 11px; color: var(--text-muted); }
p      { color: var(--text-sec); }

a { color: #60a5fa; text-decoration: none; }
a:hover { text-decoration: underline; }

code { font-family: 'SF Mono', 'Cascadia Code', monospace; font-size: 0.9em; }
pre  { overflow-x: auto; padding: 12px; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); }
hr   { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }

input, select, textarea, button { color-scheme: dark; font-family: inherit; }


/* 4. Layout Scopes –––––––––––––––––––––––––––––––––––– */

[data-layout] { height: 100vh; }
[data-layout="board"] { display: flex; flex-direction: column; }


/* 5. Board Layout (Kanban) ––––––––––––––––––––––––––– */

[data-layout="board"] > header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

[data-layout="board"] > header > span {
  color: var(--text-muted);
  font-size: 12px;
}

[data-layout="board"] > header > button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1px dashed var(--border-dashed);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 13px;
  transition: all 0.15s ease;
}

[data-layout="board"] > header > button:hover {
  border-color: rgba(14,165,233,0.5);
  color: var(--accent-light);
}

[data-layout="board"] main {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  overflow-x: auto;
  height: calc(100vh - 52px);
  align-items: flex-start;
}

/* columns */
[data-layout="board"] section {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-width: 260px;
  max-width: 260px;
  display: flex;
  flex-direction: column;
  max-height: 100%;
}

[data-layout="board"] section > header {
  padding: 12px 14px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

[data-layout="board"] section > header > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

[data-layout="board"] section > header h2 { font-size: 14px; font-weight: 600; }

[data-layout="board"] section > header span {
  background: rgba(255,255,255,0.06);
  color: var(--text-sec);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.card-list {
  padding: 0 8px 8px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-list.empty-zone {
  min-height: 3rem;
  border: 2px dashed var(--border-hover);
  border-radius: var(--radius);
}

/* task card */
[data-layout="board"] article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  cursor: grab;
  transition: all 0.15s ease;
}

[data-layout="board"] article:hover {
  border-color: var(--border-hover);
  background: var(--card-hover);
}

[data-layout="board"] article.dragging {
  opacity: 0.5;
  transform: scale(0.95);
}

[data-layout="board"] article > h3 {
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
}

.tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 8px;
  list-style: none;
}

.tags li {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.tags li.feat { background: var(--accent-bg4); color: var(--accent-light); }
.tags li.bug  { background: var(--danger-bg2); color: var(--danger); }
.tags li.docs { background: var(--purple-bg);  color: var(--purple); }
.tags li.high { background: var(--orange-bg);  color: var(--orange); }

/* card footer */
[data-layout="board"] article > footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

[data-layout="board"] article > footer > button {
  background: transparent;
  border: 0;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: all 0.15s ease;
}

[data-layout="board"] article > footer > button:hover {
  color: var(--danger);
  background: var(--danger-bg);
}

/* column footer (add card) */
[data-layout="board"] section > footer { padding: 8px; }

[data-layout="board"] section > footer button {
  width: 100%;
  padding: 6px 0;
  background: transparent;
  border: 1px dashed var(--border-dashed);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s ease;
}

[data-layout="board"] section > footer button:hover {
  border-color: rgba(14,165,233,0.5);
  color: var(--accent-light);
  background: var(--accent-bg3);
}

[data-layout="board"] section > footer input {
  width: 100%;
  padding: 8px 10px;
  background: var(--surface);
  border: 1px solid var(--border-dashed);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  margin-bottom: 6px;
  outline: none;
}

[data-layout="board"] section > footer input:focus { border-color: var(--accent); }
[data-layout="board"] section > footer input::placeholder { color: var(--text-dim); }

.add-form-actions { display: flex; gap: 6px; }

.add-btn {
  padding: 6px 14px;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  width: auto;
  transition: background 0.15s ease;
}

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

.cancel-btn {
  padding: 6px 14px;
  background: transparent;
  color: var(--text-muted);
  border: 0;
  cursor: pointer;
  font-size: 12px;
  width: auto;
  transition: color 0.15s ease;
}

.cancel-btn:hover { color: #cbd5e1; }


/* 6. Form Elements (generic) –––––––––––––––––––––––––– */

input:not([type="checkbox"]):not([type="radio"]):not([type="color"]):not([type="range"]),
select,
textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
}

input::placeholder,
textarea::placeholder { color: var(--text-dim); }

input:not([type="checkbox"]):not([type="radio"]):not([type="color"]):not([type="range"]):focus,
select:focus,
textarea:focus { border-color: var(--accent); }

textarea { resize: none; }
select { cursor: pointer; }