/* ==========================================================================
   Reading Notebook — styles
   Text-focused, comfortable reading width, lightweight tag pills.
   Palette: indigo (primary), teal (accent), slate neutrals.
   ========================================================================== */

:root {
  --color-primary: #1e73be;
  --color-primary-hover: #185f9c;
  --color-accent: #0d9488;

  --color-bg: #f9f9f5;
  --color-surface: #ffffff;
  --color-border: #e5e5e0;
  --color-text: #1c1c1c;
  --color-text-muted: #4d4d4d;

  --color-danger: #dc2626;
  --color-danger-border: #fecaca;
  --color-danger-hover-bg: #fef2f2;
  --color-on-primary: #ffffff;
  --color-on-accent: #ffffff;
  --color-tag-bg: #f0fdfa;
  --color-tag-border: #ccfbf1;

  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.06);

  --reading-width: 680px;

  /* Footer bar: a dark block in both themes, so it reads as a base rail. */
  --color-bar-bg: #1c1c1c;
  --color-bar-text: #f2f2ec;
}

/* ---------- Dark theme ----------
   theme.js sets data-theme on <html>, defaulting to the OS preference.
   Kept slightly softer than pure black: this is a reading surface used for
   long stretches, so the contrast is high but not harsh. */
:root[data-theme="dark"] {
  --color-primary: #58a6f0;
  --color-primary-hover: #7bb8f5;
  --color-accent: #2dd4bf;

  --color-bg: #1a1a17;
  --color-surface: #232320;
  --color-border: #35352f;
  --color-text: #ece9e2;
  --color-text-muted: #a5a59c;

  --color-danger: #f87171;
  --color-danger-border: #5b2626;
  --color-danger-hover-bg: #3a1c1c;
  --color-on-primary: #10233a;
  --color-on-accent: #06231f;
  --color-tag-bg: #14332e;
  --color-tag-border: #1d4a43;

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.4);
  --color-bar-bg: #100f0e;
  --color-bar-text: #e6e3dc;
}

* { box-sizing: border-box; }

/* The `hidden` attribute must always win over any rule that sets `display`. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: 'Jost', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

/* ---------- App shell / layout ---------- */

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.app-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 4px;
}

.home-link {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 2px;
}
.home-link:hover { color: var(--color-primary); }

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

.theme-toggle {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

.main-content {
  flex: 1;
  min-width: 0;
  padding: 28px 24px 60px;
}

/* ---------- Buttons ---------- */

.btn {
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  padding: 9px 16px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

.btn-block { width: 100%; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover { border-color: var(--color-primary); }

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-muted);
  text-align: left;
}
.btn-ghost:hover { background: var(--color-bg); }

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}
.btn-danger:hover { background: var(--color-danger-hover-bg); }

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
}

/* ---------- Sidebar sections ---------- */

#search-input {
  font-family: inherit;
  font-size: 0.88rem;
  padding: 8px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.sidebar-section h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-footer hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 4px 0;
  width: 100%;
}

/* ---------- Tag pills ---------- */

.tag-pill {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-tag-bg);
  border: 1px solid var(--color-tag-border);
  border-radius: 999px;
  padding: 2px 9px;
  cursor: pointer;
  white-space: nowrap;
}

.tag-pill:hover { border-color: var(--color-accent); }

.tag-pill.active {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}

.tag-pill-count {
  opacity: 0.7;
  margin-left: 2px;
}

/* ---------- Active filter banner ---------- */

.active-filter-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}

/* ---------- Note list ---------- */

.note-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: var(--reading-width);
}

.note-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.note-card:hover { border-color: var(--color-primary); }

.note-card-title {
  font-weight: 600;
  font-size: 1rem;
  margin: 0 0 4px;
}

.note-card-snippet {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.note-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.empty-msg {
  text-align: center;
  color: var(--color-text-muted);
  padding: 60px 0;
}

/* ---------- Detail view ---------- */

.detail-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  max-width: var(--reading-width);
}

.detail-toolbar-actions {
  display: flex;
  gap: 8px;
}

.note-detail {
  max-width: var(--reading-width);
}

.note-detail h1 {
  font-size: 1.5rem;
  margin: 0 0 6px;
}

.note-detail-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.note-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.note-detail-section {
  margin-bottom: 26px;
}

.note-detail-section h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin: 0 0 8px;
}

.note-detail-section .rich-content {
  font-size: 0.98rem;
}

.rich-content blockquote {
  border-left: 3px solid var(--color-border);
  margin: 10px 0;
  padding: 4px 14px;
  color: var(--color-text-muted);
  font-style: italic;
}

.rich-content ul, .rich-content ol {
  padding-left: 22px;
}

/* ---------- Form view ---------- */

#note-form {
  max-width: var(--reading-width);
}

.field-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 16px 0 5px;
}

#note-form input[type="text"] {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.rich-field { margin-top: 10px; }

.rich-field-toolbar {
  display: flex;
  gap: 3px;
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 5px;
  background: var(--color-bg);
}

.rich-field-toolbar button {
  width: 30px;
  height: 28px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-text);
}

.rich-field-toolbar button:hover {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.rich-field-editable {
  min-height: 120px;
  /* Long-form fields are user-resizable: these hold whole sections of
     reading notes, so a fixed box gets cramped fast. Requires a non-visible
     overflow for the drag handle to appear. */
  resize: vertical;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: 0 0 8px 8px;
  padding: 12px 14px;
  background: var(--color-surface);
  font-size: 0.95rem;
  line-height: 1.6;
}

.rich-field-editable:focus { outline: 2px solid var(--color-primary); outline-offset: -1px; }

.rich-field-editable p { margin: 0 0 10px; }
.rich-field-editable blockquote {
  border-left: 3px solid var(--color-border);
  margin: 10px 0;
  padding: 4px 14px;
  color: var(--color-text-muted);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* ---------- View visibility ---------- */

.view[hidden] { display: none; }

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .app-shell { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .main-content { padding: 20px 16px 48px; }
}

/* ---------- Shared version / copyright bar ---------- */

.site-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 14px 24px;
  background: var(--color-bar-bg);
  color: var(--color-bar-text);
  font-size: 0.78rem;
}

.site-bar a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.site-bar a:hover { opacity: 0.75; }

.site-bar-version {
  opacity: 0.6;
  font-variant-numeric: tabular-nums;
}