/* Index page styling — derived from the diagram-design skill (warm paper,
   ink, rust accent). Edit here to reskin the index. */

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

:root {
  --color-paper:       #faf7f2;
  --color-paper-2:     #f2ede4;
  --color-ink:         #1c1917;
  --color-muted:       #57534e;
  --color-soft:        #78716c;
  --color-rule:        rgba(28,25,23,0.12);
  --color-rule-solid:  rgba(120,113,108,0.25);
  --color-accent:      #b5523a;
  --color-accent-tint: rgba(181,82,58,0.08);
  --color-link:        #2563eb;
  --font-sans:  'Geist', system-ui, sans-serif;
  --font-serif: 'Instrument Serif', 'Times New Roman', serif;
  --font-mono:  'Geist Mono', ui-monospace, Menlo, monospace;
}

html, body { height: 100%; }

/* The `hidden` attribute must always hide — CSS `display: flex/grid/...` on
   the same element would otherwise win. Spec-correct, idiomatic reset. */
[hidden] { display: none !important; }

body {
  font-family: var(--font-sans);
  background: var(--color-paper);
  color: var(--color-ink);
  min-height: 100vh;
  padding: 3rem 2rem 4rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; }

/* ── Header ─────────────────────────────────────────────────── */
.header { margin-bottom: 2.5rem; }

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3vw + 1rem, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--color-ink);
  margin-bottom: 0.625rem;
}

.subtitle {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--color-muted);
  max-width: 52ch;
}

/* ── Buttons ────────────────────────────────────────────────── */
.primary-btn,
.ghost-btn {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  padding: 0.625rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
  white-space: nowrap;
}
.primary-btn {
  background: var(--color-ink);
  color: var(--color-paper);
  border: 1px solid var(--color-ink);
}
.primary-btn:hover { background: var(--color-accent); border-color: var(--color-accent); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.ghost-btn {
  background: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-rule-solid);
}
.ghost-btn:hover { color: var(--color-ink); border-color: var(--color-ink); }

.danger-btn {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  padding: 0.625rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  background: var(--color-accent);
  color: var(--color-paper);
  border: 1px solid var(--color-accent);
  transition: background-color 120ms ease, border-color 120ms ease;
  white-space: nowrap;
}
.danger-btn:hover { background: #8e3b27; border-color: #8e3b27; }
.danger-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.icon-btn {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  line-height: 1;
  background: transparent;
  border: 0;
  color: var(--color-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}
.icon-btn:hover { color: var(--color-ink); background: var(--color-paper-2); }

/* ── Header nav (link + button) ─────────────────────────────── */
.header-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-muted);
  text-decoration: none;
  padding: 0.5rem 0.625rem;
  border-radius: 4px;
  transition: color 120ms ease, background-color 120ms ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-ink); background: var(--color-paper-2); }

/* ── Filter bar (search + tag chips) ────────────────────────── */
.filter-bar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.search-wrap { position: relative; width: 100%; }

.search-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  background: #ffffff;
  border: 1px solid var(--color-rule-solid);
  border-radius: 6px;
  padding: 0.625rem 2.25rem 0.625rem 0.875rem;
  color: var(--color-ink);
}
.search-input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
  border-color: var(--color-accent);
}
.search-input::-webkit-search-cancel-button,
.search-input::-webkit-search-decoration { display: none; }

.search-clear {
  position: absolute;
  right: 0.375rem;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  color: var(--color-soft);
  cursor: pointer;
  border-radius: 4px;
}
.search-clear:hover { color: var(--color-ink); background: var(--color-paper-2); }

.tag-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.tag-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  background: transparent;
  border: 1px solid var(--color-rule-solid);
  border-radius: 999px;
  padding: 0.375rem 0.625rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}
.tag-chip:hover {
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.tag-chip.active {
  color: var(--color-accent);
  background: var(--color-accent-tint);
  border-color: var(--color-accent);
}

.tag-count {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--color-soft);
  background: var(--color-paper-2);
  border-radius: 999px;
  padding: 0.05rem 0.375rem;
  min-width: 1.25em;
  text-align: center;
}
.tag-chip.active .tag-count {
  background: var(--color-accent);
  color: var(--color-paper);
}

.filter-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--color-soft);
  padding: 0.625rem 0.875rem;
  background: var(--color-paper-2);
  border-radius: 4px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}
.filter-status-text { flex: 1; min-width: 0; }

.filter-clear {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  background: transparent;
  border: 0;
  padding: 0.25rem 0.5rem;
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
  border-radius: 4px;
}
.filter-clear:hover { background: rgba(181,82,58,0.10); }

/* ── Year / month groupings ─────────────────────────────────── */
.year-section + .year-section { margin-top: 3rem; }

.year-heading {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 2.5rem 0 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-rule);
}
.year-section:first-of-type .year-heading { margin-top: 0; }

.month-section { margin-top: 1.5rem; }

.month-heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-soft);
  margin-bottom: 0.75rem;
}

/* ── Card grid ──────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card-wrap {
  position: relative;
  display: block;
}
.card-wrap:hover .card-menu,
.card-wrap:focus-within .card-menu { opacity: 1; }

.card-menu {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--color-muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms ease, background-color 120ms ease, color 120ms ease, border-color 120ms ease;
  z-index: 2;
}
.card-menu:hover,
.card-menu:focus-visible {
  opacity: 1;
  background: var(--color-paper-2);
  color: var(--color-ink);
  border-color: var(--color-rule);
  outline: none;
}

.card {
  display: block;
  background: #ffffff;
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms ease, transform 120ms ease;
}
.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}
.card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.card-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-soft);
  margin-bottom: 0.625rem;
  min-height: 1em;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.card-blurb {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.75rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-soft);
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
}

.empty {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--color-muted);
  padding: 3rem 1rem;
  text-align: center;
  border: 1px dashed var(--color-rule-solid);
  border-radius: 6px;
}
.empty code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-style: normal;
  background: var(--color-paper-2);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
}

/* ── Pagination ─────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}
.pagination .page-link,
.pagination .page-nav {
  color: var(--color-muted);
  text-decoration: none;
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}
.pagination a.page-link:hover,
.pagination a.page-nav:hover {
  color: var(--color-ink);
  border-color: var(--color-rule-solid);
}
.pagination .page-link.active {
  color: var(--color-ink);
  background: var(--color-paper-2);
  border-color: var(--color-rule);
}
.pagination .disabled {
  color: var(--color-rule-solid);
  cursor: default;
}

/* ── Card popover (three-dot menu) ──────────────────────────── */
.card-popover {
  position: fixed;
  z-index: 1050;
  min-width: 140px;
  background: var(--color-paper);
  border: 1px solid var(--color-rule-solid);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(28,25,23,0.16);
  padding: 0.25rem;
  display: flex;
  flex-direction: column;
}

.card-popover-item {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  color: var(--color-ink);
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}
.card-popover-item:hover { background: var(--color-paper-2); }
.card-popover-item-danger { color: var(--color-accent); }
.card-popover-item-danger:hover { background: rgba(181,82,58,0.10); }

/* ── Modal ──────────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal[hidden] { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(28,25,23,0.45);
  backdrop-filter: blur(2px);
}

.modal-panel {
  position: relative;
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: 8px;
  width: min(520px, calc(100% - 2rem));
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(28,25,23,0.20);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-rule);
}
.modal-head h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.015em;
}

.modal-form {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.field { display: flex; flex-direction: column; gap: 0.375rem; }

.field-label {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink);
}

.field-hint {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-soft);
  margin-left: 0.375rem;
}

.field input[type="text"],
.field input[type="file"],
.field textarea {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-ink);
  background: #ffffff;
  border: 1px solid var(--color-rule-solid);
  border-radius: 4px;
  padding: 0.5rem 0.625rem;
  width: 100%;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
  border-color: var(--color-accent);
}

.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.form-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  padding: 0.5rem 0.625rem;
  border-radius: 4px;
  margin-top: 0.5rem;
  background: var(--color-paper-2);
  color: var(--color-muted);
}
.form-status.ok  { background: rgba(34,134,58,0.08);  color: #1f6e3f; }
.form-status.err { background: rgba(181,82,58,0.10);  color: var(--color-accent); }
.form-status a { color: inherit; text-decoration: underline; }

.archive-explainer {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin-bottom: 1rem;
}
.archive-explainer strong { color: var(--color-ink); font-weight: 600; }
.archive-explainer code {
  font-family: var(--font-mono);
  font-size: 0.825em;
  background: var(--color-paper-2);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
}

/* ── Docs page (how-it-works) ──────────────────────────────── */
.docs { max-width: 720px; }
.docs .back-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  text-decoration: none;
  margin-bottom: 1.5rem;
}
.docs .back-link:hover { color: var(--color-ink); }
.docs h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.015em;
  margin-top: 2.5rem;
  margin-bottom: 0.625rem;
  color: var(--color-ink);
}
.docs h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.375rem;
  color: var(--color-ink);
}
.docs p, .docs li {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-ink);
}
.docs p, .docs ul, .docs ol, .docs pre { margin-bottom: 1rem; }
.docs ul, .docs ol { padding-left: 1.5rem; }
.docs li { margin-bottom: 0.375rem; color: var(--color-muted); }
.docs li strong { color: var(--color-ink); font-weight: 600; }
.docs code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-paper-2);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
}
.docs pre {
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 0.875rem 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.55;
}
.docs pre code { background: transparent; padding: 0; font-size: inherit; }
.docs a { color: var(--color-accent); }
.docs a:hover { text-decoration: underline; }

/* ── Toast ──────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: calc(100% - 2rem);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  background: var(--color-paper);
  border: 1px solid var(--color-rule-solid);
  border-radius: 8px;
  padding: 0.75rem 0.875rem;
  box-shadow: 0 8px 24px rgba(28,25,23,0.12);
  min-width: 280px;
  max-width: 360px;
  animation: toast-in 200ms ease-out;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.toast-spinner {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--color-rule-solid);
  border-top-color: var(--color-ink);
  border-radius: 50%;
  margin-top: 2px;
  animation: spin 800ms linear infinite;
}
.toast.success .toast-spinner {
  animation: none;
  border-color: #1f6e3f;
  background: #1f6e3f;
  position: relative;
}
.toast.success .toast-spinner::after {
  content: '';
  position: absolute;
  left: 3px; top: 1px;
  width: 4px; height: 7px;
  border: solid #ffffff;
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}
.toast.error .toast-spinner {
  animation: none;
  border-color: var(--color-accent);
  background: var(--color-accent);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.toast-body { flex: 1; min-width: 0; }

.toast-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.125rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toast-msg {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}
.toast.success .toast-msg { color: #1f6e3f; }
.toast.error   .toast-msg { color: var(--color-accent); }

.toast-action {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  background: transparent;
  border: 0;
  padding: 0;
  margin-left: 0.25rem;
  color: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.toast-close {
  flex-shrink: 0;
  background: transparent;
  border: 0;
  color: var(--color-soft);
  font-size: 1.125rem;
  line-height: 1;
  padding: 0 0.25rem;
  cursor: pointer;
}
.toast-close:hover { color: var(--color-ink); }

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--color-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ── Mobile ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  body { padding: 1.5rem 1rem 2.5rem; }

  .header { margin-bottom: 1.75rem; }
  .header-row { flex-direction: column; gap: 1rem; align-items: stretch; }
  .header-nav { width: 100%; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
  .header-nav .primary-btn { align-self: stretch; }
  .nav-link { padding: 0.375rem 0; }
  .filter-status { flex-direction: column; align-items: flex-start; gap: 0.25rem; }

  h1 { font-size: 1.75rem; }
  .subtitle { font-size: 0.9375rem; }

  .year-heading { font-size: 1.5rem; margin-top: 2rem; }
  .year-section + .year-section { margin-top: 2rem; }
  .month-section { margin-top: 1.25rem; }

  .grid { gap: 0.625rem; grid-template-columns: 1fr; }
  .card { padding: 1rem; }
  .card-title { font-size: 1.125rem; }
  .card-blurb {
    font-size: 0.8125rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .pagination { margin-top: 2rem; flex-wrap: wrap; }

  .footer { flex-direction: column; align-items: flex-start; gap: 0.25rem; }

  .modal { align-items: flex-end; }
  .modal-panel {
    width: 100%;
    max-height: 90vh;
    border-radius: 12px 12px 0 0;
    border-bottom: 0;
  }

  #toast-container {
    top: 0.5rem;
    left: 0.5rem;
    right: 0.5rem;
    max-width: none;
  }
  .toast { min-width: 0; max-width: none; }
}

@media (max-width: 640px) {
  /* Touch devices: always show the menu so users don't have to "hover". */
  .card-menu { opacity: 1; }
}

@media (max-width: 420px) {
  .card { padding: 0.875rem; padding-right: 2.75rem; }
  .card-tags { gap: 0.25rem; }
  .tag { font-size: 0.58rem; padding: 0.1rem 0.4rem; }
}