/* Server-rendered pages: /materials, /materials/:slug, /mypage, /login, /login/verify. */

.narrow { max-width: 640px; }
.page-title { font-size: clamp(1.4rem, 4vw, 2rem); color: var(--navy); margin: 12px 0 10px; }
.page-lead { color: var(--muted); margin: 0 0 24px; }
.section-title { font-size: 1.2rem; color: var(--navy); margin: 8px 0 16px; }
.card + .card { margin-top: 16px; }
.card-title { font-size: 1.05rem; color: var(--navy); margin: 0 0 8px; }
.fine { font-size: 0.8rem; color: var(--muted); margin: 8px 0 0; }
.notice { background: var(--warn-soft); color: var(--warn); border-radius: 10px; padding: 10px 14px; font-weight: 700; font-size: 0.9rem; margin: 0 0 16px; }
.notice-ok { background: var(--ok-soft); color: var(--ok); }

/* Auth */
.auth-card { display: grid; gap: 12px; }
.auth-card h1 { margin: 0; font-size: 1.4rem; color: var(--navy); }
.auth-card p { margin: 0; }
.auth-card form { display: grid; gap: 12px; }

/* Material detail */
.material-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; }
@media (max-width: 860px) { .material-layout { grid-template-columns: 1fr; } }
.article .material-tags { margin-top: 12px; }
.purchase-box { position: sticky; top: 92px; display: grid; gap: 6px; }
.purchase-box .btn { margin-top: 10px; width: 100%; }
.purchase-name { margin: 0; font-weight: 800; color: var(--navy); letter-spacing: 0.04em; }
.purchase-price { margin: 0; font-size: 1.7rem; font-weight: 800; color: var(--navy); }
.chapter-list { padding-left: 1.4em; }
.chapter-list li { padding: 4px 0; }
.checklist { list-style: none; padding: 0; }
.checklist li { position: relative; padding: 4px 0 4px 1.7em; }
.checklist li::before { content: ""; position: absolute; left: 0; top: 0.65em; width: 1em; height: 1em; border: 2px solid var(--blue); border-radius: 4px; }
.template-box { white-space: pre-wrap; font: inherit; font-size: 0.9rem; background: #fbfcfe; border: 1px solid var(--line); border-radius: 10px; padding: 14px; overflow-x: auto; }
.material-back { margin-top: 40px; font-size: 0.9rem; }
.tag-genre { background: var(--cyan-soft); color: var(--cyan-ink); }

/* Materials list: level switch + genre filter (client-side only, src js/materials-level.js) */
.level-switch, .genre-filter { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; }
.genre-filter { margin: 16px 0 28px; }
.level-switch-btn, .genre-filter-btn {
  font: inherit; font-size: 0.85rem; font-weight: 700; cursor: pointer;
  background: var(--surface); color: var(--navy); border: 1.5px solid var(--line);
  border-radius: 999px; padding: 8px 16px;
}
.level-switch-btn:hover, .genre-filter-btn:hover { background: var(--blue-soft); }
.level-switch-btn[aria-pressed="true"] { background: var(--blue); color: #fff; border-color: var(--blue); }
.genre-filter-btn[aria-pressed="true"] { background: var(--navy); color: #fff; border-color: var(--navy); }
.material-level-section { margin-bottom: 8px; }
.material-level-section .section-title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.level-start-badge { font-size: 0.75rem; font-weight: 700; background: var(--ok-soft); color: var(--ok); border-radius: 999px; padding: 4px 12px; }
.material-card[hidden] { display: none; }