/* ============================================================
   GRAMMAR PAGES — adjectives / conjugation / reference
   Depends on the tokens declared in styles.css :root
   (--ink, --paper, --paper-warm, --accent, --sage, --gold,
    --text, --text-light). Nothing here redefines them.
   ============================================================ */

:root {
  --g-nav-h: 72px;
  --g-rule: rgba(0, 0, 0, 0.1);
  --g-rule-soft: rgba(0, 0, 0, 0.06);
  --g-godan: #4a90a4;
  --g-irregular: #7a5ba4;
}

/* ---------- page shell ---------- */

.g-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

.g-body {
  min-width: 0;
}

.g-body > .page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 3px solid var(--accent);
}

/* ---------- sidebar ---------- */

.g-side {
  position: sticky;
  top: calc(var(--g-nav-h) + 2rem);
  background: var(--paper-warm);
  border: 1px solid var(--g-rule-soft);
  border-radius: 4px;
  padding: 1.25rem;
  max-height: calc(100vh - var(--g-nav-h) - 4rem);
  overflow-y: auto;
}

/* The sidebar is a <details>. On desktop it is always open and the
   summary is redundant, so it is hidden; on mobile it comes back as a
   real disclosure control (see the media query at the foot of the file). */
.g-side > summary {
  display: none;
}

.g-side-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

.g-toc {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-bottom: 1.25rem;
}

.g-toc a {
  display: block;
  padding: 0.4rem 0.6rem;
  font-size: 0.88rem;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.g-toc a:hover {
  background: rgba(196, 92, 74, 0.08);
  color: var(--ink);
}

.g-toc a.is-active {
  border-left-color: var(--accent);
  background: rgba(196, 92, 74, 0.1);
  color: var(--ink);
  font-weight: 600;
}

.g-toc-part {
  margin: 1rem 0 0.35rem;
  padding-left: 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  border-top: 1px solid var(--g-rule-soft);
  padding-top: 0.9rem;
}

.g-toc-part:first-child {
  margin-top: 0;
  border-top: 0;
  padding-top: 0;
}

.g-side-tools {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--g-rule-soft);
}

.g-btn {
  display: block;
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--g-rule);
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.g-btn:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.g-btn[aria-pressed="false"] {
  color: var(--text-light);
  background: transparent;
  border-style: dashed;
}

/* ---------- section filter (reference page) ---------- */

.g-filter {
  margin-bottom: 1.25rem;
}

.g-filter input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--paper);
  border: 1px solid var(--g-rule);
  border-radius: 3px;
}

.g-filter input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

.g-filter-count {
  margin-top: 0.4rem;
  min-height: 1.1em;
  font-size: 0.78rem;
  color: var(--text-light);
}

.g-body .g-no-matches {
  padding: 2rem;
  text-align: center;
  color: var(--text-light);
  background: var(--paper-warm);
  border: 1px dashed var(--g-rule);
  border-radius: 4px;
}

/* ---------- sections and prose ---------- */

.g-sec {
  margin-bottom: 3rem;
}

.g-sec > h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--g-rule-soft);
}

.g-sec h3 {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--ink);
  margin: 2rem 0 0.75rem;
}

.g-sec h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin: 1.25rem 0 0.5rem;
}

.g-body p {
  margin-bottom: 1rem;
  max-width: 68ch;
  line-height: 1.75;
}

.g-body ul,
.g-body ol {
  margin: 0 0 1.25rem 1.3rem;
  max-width: 68ch;
}

.g-body li {
  margin-bottom: 0.45rem;
  line-height: 1.7;
}

.g-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.g-body a:hover {
  color: var(--ink);
}

.g-body strong {
  color: var(--ink);
  font-weight: 600;
}

.g-body hr {
  border: 0;
  border-top: 1px solid var(--g-rule-soft);
  margin: 2rem 0 0;
}

.g-body code {
  font-size: 0.9em;
  background: var(--paper-warm);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.g-body pre {
  background: var(--paper-warm);
  border-left: 3px solid var(--gold);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.7;
}

/* anchor targets must clear the fixed nav */
.g-body [id],
.g-side [id] {
  scroll-margin-top: calc(var(--g-nav-h) + 1.5rem);
}

.g-body h2:focus-visible,
.g-body summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- tables ---------- */

.g-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border: 1px solid var(--g-rule-soft);
  border-radius: 4px;
}

.g-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.g-table-wrap th {
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-align: left;
  padding: 0.7rem 0.85rem;
  white-space: nowrap;
}

.g-table-wrap td {
  padding: 0.7rem 0.85rem;
  border-top: 1px solid var(--g-rule-soft);
  vertical-align: top;
}

.g-table-wrap tbody tr:nth-child(even) {
  background: var(--paper-warm);
}

.g-table-wrap td:first-child {
  font-weight: 500;
  color: var(--ink);
}

/* the い／な comparison tables: tint the two class columns */
.g-table-inay th:nth-child(2),
.g-table-inay td:nth-child(2) {
  background: rgba(122, 158, 126, 0.1);
}

.g-table-inay th:nth-child(3),
.g-table-inay td:nth-child(3) {
  background: rgba(74, 144, 164, 0.1);
}

.g-table-inay th:nth-child(2),
.g-table-inay th:nth-child(3) {
  background: var(--ink);
}

/* vocabulary tables */
.g-table-wrap table[data-deck] td:first-child {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.1rem;
}

/* ---------- trap blocks (✕ / ✓) ---------- */

.g-trap {
  margin: 1.25rem 0;
  border: 1px solid var(--g-rule-soft);
  border-radius: 4px;
  overflow: hidden;
  max-width: 68ch;
}

.g-body .g-trap p {
  margin: 0;
  padding: 0.65rem 1rem;
  max-width: none;
  line-height: 1.6;
}

.g-trap-bad {
  background: rgba(196, 92, 74, 0.09);
  border-left: 3px solid var(--accent);
  color: var(--text);
}

.g-trap-good {
  background: rgba(122, 158, 126, 0.12);
  border-left: 3px solid var(--sage);
  color: var(--text);
}

.g-trap-bad + .g-trap-good {
  border-top: 1px solid var(--g-rule-soft);
}

.g-x {
  color: var(--accent);
  font-weight: 700;
}

/* ---------- split cards ---------- */

.g-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.g-split-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.g-split > div {
  padding: 1.35rem;
  border: 2px solid var(--g-rule);
  border-radius: 4px;
  background: var(--paper);
}

.g-split h4 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.g-body .g-split-sub {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  color: var(--text-light);
  max-width: none;
}

.g-body .g-split-ex {
  margin: 0;
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem;
  color: var(--ink);
  max-width: none;
}

.g-split-i {
  border-color: var(--sage);
  background: rgba(122, 158, 126, 0.07);
}

.g-split-i h4 {
  color: var(--sage);
}

.g-split-na {
  border-color: var(--g-godan);
  background: rgba(74, 144, 164, 0.07);
}

.g-split-na h4 {
  color: var(--g-godan);
}

.g-split-x {
  border-color: var(--g-irregular);
  background: rgba(122, 91, 164, 0.07);
}

.g-split-x h4 {
  color: var(--g-irregular);
}

/* ---------- asides and notes ---------- */

.g-aside {
  margin: 1.5rem 0;
  padding: 1.1rem 1.35rem;
  background: var(--paper-warm);
  border: 1px solid var(--g-rule-soft);
  border-left: 3px solid var(--gold);
  border-radius: 0 4px 4px 0;
}

.g-aside > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

.g-aside > summary::-webkit-details-marker {
  display: none;
}

.g-aside > summary::before {
  content: '▸';
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--gold);
  transition: transform 0.15s;
}

.g-aside[open] > summary::before {
  transform: rotate(90deg);
}

.g-aside[open] > summary {
  margin-bottom: 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--g-rule-soft);
}

.g-body .g-aside > :last-child {
  margin-bottom: 0;
}

.g-body .g-note {
  margin: 1.25rem 0;
  padding: 0.8rem 1.1rem;
  max-width: 68ch;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-light);
  background: rgba(201, 169, 98, 0.1);
  border-left: 3px solid var(--gold);
  border-radius: 0 3px 3px 0;
}

.g-body .g-note strong {
  color: var(--ink);
}

/* ---------- furigana ---------- */

ruby rt {
  font-size: 0.55em;
  color: var(--text-light);
  font-weight: 400;
}

.g-page[data-furigana="off"] rt {
  display: none;
}

/* ---------- responsive ---------- */

@media (max-width: 1000px) {
  .g-page {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
    padding: 2rem 1.5rem 4rem;
  }

  .g-side {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .g-side > summary {
    display: block;
    cursor: pointer;
    font-weight: 600;
    color: var(--ink);
    list-style: none;
  }

  .g-side > summary::-webkit-details-marker {
    display: none;
  }

  .g-side > summary::after {
    content: '+';
    float: right;
    color: var(--accent);
    font-weight: 700;
  }

  .g-side[open] > summary {
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--g-rule-soft);
  }

  .g-side[open] > summary::after {
    content: '–';
  }

  .g-split,
  .g-split-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  .g-page {
    padding: 1.5rem 1rem 3rem;
  }

  .g-sec > h2 {
    font-size: 1.35rem;
  }

  .g-table-wrap table {
    font-size: 0.88rem;
  }

  .g-body p,
  .g-body ul,
  .g-body ol,
  .g-body .g-trap,
  .g-body .g-note {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .g-toc a,
  .g-btn,
  .g-aside > summary::before {
    transition: none;
  }
}

@media print {
  .g-side,
  .nav,
  .back-to-top {
    display: none;
  }

  .g-page {
    display: block;
    padding: 0;
  }

  .g-aside {
    break-inside: avoid;
  }
}