/* GitHub-flavoured dark theme. Tokens loosely based on Primer. */
:root {
  --canvas: #0d1117;
  --canvas-subtle: #161b22;
  --canvas-overlay: #1c2128;
  --canvas-inset: #010409;
  --border: #30363d;
  --border-muted: #21262d;
  --fg-default: #e6edf3;
  --fg-muted: #8b949e;
  --fg-subtle: #6e7681;
  --accent: #2f81f7;
  --accent-emphasis: #1f6feb;
  --success: #3fb950;
  --danger: #f85149;
  --shadow-md: 0 8px 24px rgba(1, 4, 9, 0.5);
  --shadow-sm: 0 1px 0 rgba(1, 4, 9, 0.4);
  --radius: 6px;
  --radius-sm: 4px;
  --topbar-h: 56px;
  --sidebar-w: 220px;
}

@media (prefers-color-scheme: light) {
  :root {
    --canvas: #ffffff;
    --canvas-subtle: #f6f8fa;
    --canvas-overlay: #ffffff;
    --canvas-inset: #f6f8fa;
    --border: #d1d9e0;
    --border-muted: #e4e8ee;
    --fg-default: #1f2328;
    --fg-muted: #59636e;
    --fg-subtle: #818b97;
    --accent: #0969da;
    --accent-emphasis: #0550ae;
    --shadow-md: 0 8px 24px rgba(140,149,159,0.2);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-default);
  background: var(--canvas);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font: inherit; color: inherit; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 0 16px;
  background: var(--canvas-subtle);
  border-bottom: 1px solid var(--border);
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600;
  color: var(--fg-default);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }

.topbar-search {
  display: flex; align-items: center;
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0 8px;
  max-width: 640px;
  width: 100%;
  justify-self: center;
  transition: border-color .15s, box-shadow .15s;
}
.topbar-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(47,129,247,.3);
}
.topbar-search input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: 0;
  color: var(--fg-default);
  padding: 8px;
  font-size: 14px;
}
.search-icon { color: var(--fg-muted); margin-left: 4px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--canvas-subtle);
  color: var(--fg-default);
  padding: 6px 14px;
  border-radius: var(--radius);
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--canvas-overlay); border-color: var(--fg-muted); }
.btn-primary {
  background: #238636; /* GH green */
  border-color: rgba(240,246,252,0.1);
  color: #fff;
}
.btn-primary:hover { background: #2ea043; }
.btn-text {
  background: transparent;
  border: 0;
  color: var(--fg-muted);
  padding: 4px 10px;
}
.btn-text:hover { color: var(--fg-default); background: var(--canvas-overlay); }
.btn-danger { background: var(--danger); color: #fff; border-color: transparent; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border: 0;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--canvas-overlay); color: var(--fg-default); }
.icon-btn.active { color: var(--accent); }

/* ---------- layout ---------- */
.layout {
  display: flex;
  align-items: stretch;
  min-height: calc(100vh - var(--topbar-h));
}
.layout > .sidebar { flex: 0 0 var(--sidebar-w); }
.layout > .main { flex: 1 1 0; min-width: 0; }
.layout.sidebar-collapsed > .sidebar { display: none; }

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--canvas-subtle);
  padding: 16px 8px;
  position: sticky;
  top: var(--topbar-h);
  align-self: start;
  max-height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
}
.new-note-btn { width: 100%; margin-bottom: 16px; }

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--fg-default);
  text-decoration: none;
  cursor: pointer;
  font-size: 13px;
  border: 1px solid transparent;
}
.nav-item:hover { background: var(--canvas-overlay); text-decoration: none; }
.nav-item.active { background: var(--canvas-overlay); border-color: var(--border); }
.nav-icon { display: inline-block; width: 16px; text-align: center; color: var(--fg-muted); }

.sidebar-section { margin-top: 18px; }
.sidebar-section-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 10px;
  font-size: 11px; text-transform: uppercase; letter-spacing: .5px;
  color: var(--fg-muted);
}

.label-count {
  margin-left: auto;
  font-size: 11px;
  color: var(--fg-subtle);
}

/* ---------- main ---------- */
.main {
  padding: 20px clamp(16px, 4vw, 40px);
  min-width: 0;
}
.status-bar {
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--fg-muted);
  display: flex; gap: 8px; align-items: center;
  min-height: 18px;
}
.status-bar .pill {
  background: var(--canvas-overlay);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 11px;
}

.notes-grid {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.notes-col {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.empty-state {
  padding: 64px 16px;
  text-align: center;
  color: var(--fg-muted);
}
.scroll-sentinel { height: 1px; }

/* ---------- note card ---------- */
.note-card {
  margin: 0 0 16px 0;
  background: var(--canvas-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, transform .1s;
  position: relative;
  display: flex; flex-direction: column;
}
.note-card:hover { border-color: var(--fg-subtle); box-shadow: var(--shadow-sm); }
.note-card[draggable="true"] { cursor: grab; }
.note-card[draggable="true"]:active { cursor: grabbing; }
.note-card.dragging { opacity: 0.4; }
.note-card.drop-before { box-shadow: 0 -3px 0 0 var(--accent); }
.note-card.drop-after { box-shadow: 0 3px 0 0 var(--accent); }
.note-card .note-title {
  font-weight: 600;
  margin: 0 0 6px 0;
  font-size: 14px;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.note-card .note-text {
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  font-size: 13px;
  color: var(--fg-default);
  max-height: 320px;
  overflow: hidden;
  position: relative;
  margin: 0;
}
.note-card .note-text.clipped::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0; height: 32px;
  background: linear-gradient(to bottom, transparent, var(--card-bg, var(--canvas-subtle)));
  pointer-events: none;
}
.note-card .note-pin {
  position: absolute;
  top: 8px; right: 8px;
  font-size: 12px;
  color: var(--fg-muted);
}
.note-card .note-pin.pinned { color: #d29922; }
.note-card .note-meta {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-muted);
}
.note-card .label {
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 11px;
  color: var(--fg-muted);
}
.note-card .attachment-strip {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin: 6px 0 4px 0;
}
.note-card .attachment-strip img {
  max-height: 200px; max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: cover;
  background: var(--canvas-inset);
}
.note-card .attachment-chip {
  font-size: 11px; color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  background: var(--canvas-inset);
}

/* ---------- color tints (Keep palette, GH-tinted) ---------- */
.note-card[data-color="DEFAULT"]  { --card-bg: var(--canvas-subtle); }
.note-card[data-color="RED"]      { --card-bg: #3a1d1d; border-color: #6e2a2a; }
.note-card[data-color="ORANGE"]   { --card-bg: #3a2a17; border-color: #7a5018; }
.note-card[data-color="YELLOW"]   { --card-bg: #36321a; border-color: #7a6418; }
.note-card[data-color="GREEN"]    { --card-bg: #1c3324; border-color: #2c5e3e; }
.note-card[data-color="TEAL"]     { --card-bg: #163433; border-color: #1f5454; }
.note-card[data-color="BLUE"]     { --card-bg: #14264a; border-color: #1f4275; }
.note-card[data-color="CERULEAN"] { --card-bg: #15314a; border-color: #1f4d70; }
.note-card[data-color="PURPLE"]   { --card-bg: #2a1f3e; border-color: #4a3674; }
.note-card[data-color="PINK"]     { --card-bg: #3a1f2f; border-color: #6a3052; }
.note-card[data-color="BROWN"]    { --card-bg: #2c2418; border-color: #5a472a; }
.note-card[data-color="GRAY"]     { --card-bg: #1f242b; border-color: #3a4148; }
.note-card { background: var(--card-bg); }

@media (prefers-color-scheme: light) {
  .note-card[data-color="DEFAULT"]  { --card-bg: #ffffff; }
  .note-card[data-color="RED"]      { --card-bg: #fde2e1; border-color: #f0a8a4; }
  .note-card[data-color="ORANGE"]   { --card-bg: #fde6cc; border-color: #f3b974; }
  .note-card[data-color="YELLOW"]   { --card-bg: #fdf4c6; border-color: #ddc457; }
  .note-card[data-color="GREEN"]    { --card-bg: #d6f5dc; border-color: #6ec280; }
  .note-card[data-color="TEAL"]     { --card-bg: #d0eeec; border-color: #5fb3ad; }
  .note-card[data-color="BLUE"]     { --card-bg: #d3e3fa; border-color: #6ea4eb; }
  .note-card[data-color="CERULEAN"] { --card-bg: #d3e8fa; border-color: #5cabe5; }
  .note-card[data-color="PURPLE"]   { --card-bg: #e6d8f6; border-color: #a98bcf; }
  .note-card[data-color="PINK"]     { --card-bg: #fbdce8; border-color: #e58cb1; }
  .note-card[data-color="BROWN"]    { --card-bg: #ebe1d0; border-color: #b89a6e; }
  .note-card[data-color="GRAY"]     { --card-bg: #eef0f3; border-color: #c9d1d9; }
}

/* ---------- modal & editor ---------- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(1,4,9,0.6);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 6vh 16px;
  z-index: 100;
  overflow-y: auto;
}
.editor-card {
  width: min(680px, 100%);
  cursor: default;
  padding: 16px;
  box-shadow: var(--shadow-md);
}
.editor-title, .editor-text {
  width: 100%;
  background: transparent;
  color: var(--fg-default);
  border: 0;
  outline: 0;
  font: inherit;
  resize: vertical;
}
.editor-title {
  font-size: 18px;
  font-weight: 600;
  padding: 4px 0;
  margin-bottom: 4px;
}
.editor-text {
  min-height: 180px;
  padding: 4px 0;
  font-size: 14px;
  white-space: pre-wrap;
  font-family: inherit;
}
.editor-attachments {
  display: flex; flex-direction: column; gap: 6px;
  margin: 8px 0;
}
.editor-attachments .att-row {
  display: flex; align-items: center; gap: 8px;
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: 12px;
}
.editor-attachments .att-row img {
  max-height: 48px;
  border-radius: var(--radius-sm);
}
.editor-attachments .att-row a {
  color: var(--fg-default);
  flex: 1;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.editor-attachments .att-row .meta { color: var(--fg-muted); font-size: 11px; }
.editor-labels {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin: 6px 0;
}
.editor-labels .label {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--fg-muted);
}
.editor-labels .label .x {
  cursor: pointer;
  color: var(--fg-subtle);
}
.editor-labels .label .x:hover { color: var(--danger); }

.editor-toolbar {
  display: flex; align-items: center; gap: 4px;
  padding-top: 8px;
  border-top: 1px solid var(--border-muted);
  margin-top: 8px;
}
.editor-spacer { flex: 1; }

.color-picker {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  padding: 10px;
  margin-top: 8px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.color-swatch {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  cursor: pointer;
}
.color-swatch.active { box-shadow: 0 0 0 2px var(--accent); }

.label-picker {
  margin-top: 8px;
  background: var(--canvas-overlay);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  max-height: 240px;
  overflow-y: auto;
}
.label-picker .lp-row {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
}
.label-picker .lp-row:hover { background: var(--canvas-subtle); }
.label-picker input[type=text] {
  width: 100%;
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  color: var(--fg-default);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  outline: 0;
}
.label-picker input[type=text]:focus { border-color: var(--accent); }

/* ---------- account ---------- */
.account-card {
  width: min(440px, 100%);
  background: var(--canvas-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  cursor: default;
  box-shadow: var(--shadow-md);
}
.account-card h2 { margin: 0 0 4px; font-size: 18px; }
.account-card h3 { margin: 18px 0 8px; font-size: 14px; color: var(--fg-muted); }

/* ---------- login ---------- */
.login-body {
  background: var(--canvas);
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
}
.login-card {
  width: min(360px, 92%);
  background: var(--canvas-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-md);
}
.login-title {
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 18px;
  font-size: 18px;
  justify-content: center;
}
.login-mark { color: var(--fg-default); }
.login-form { display: flex; flex-direction: column; gap: 12px; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--fg-muted); }
.field input {
  background: var(--canvas-inset);
  border: 1px solid var(--border);
  color: var(--fg-default);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: 0;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(47,129,247,.3); }
.error { color: var(--danger); font-size: 12px; margin: 0; }
.hint { color: var(--fg-muted); font-size: 12px; margin: 4px 0 0; }
.hint.success { color: var(--success); }
.hint.error { color: var(--danger); }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 16px; left: 50%;
  transform: translateX(-50%);
  background: var(--canvas-overlay);
  border: 1px solid var(--border);
  color: var(--fg-default);
  padding: 8px 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  z-index: 200;
  font-size: 13px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-subtle); }
::-webkit-scrollbar-track { background: transparent; }