/* ── definitions.css — Definitions Index & Detail Page ─────────────────────── */

/* ── Search bar ─────────────────────────────────────────────────────────────── */
.definitions-search {
    position: relative;
    display: flex;
    align-items: center;
    margin-top: var(--space-4);
    max-width: 480px;
}

.definitions-search__input {
    width: 100%;
    padding: 0.55rem 2.4rem 0.55rem 1rem;
    border-radius: var(--pui-radius-pill);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.definitions-search__input:focus {
    border-color: var(--accent);
}

.definitions-search__input:focus-visible,
.definitions-search__clear:focus-visible,
.definition-card:focus-visible,
.learn-tag:focus-visible,
.definition-nav__prev:focus-visible,
.definition-nav__next:focus-visible,
.definition-nav__all:focus-visible {
    outline: var(--pui-focus-width) solid var(--focus-ring-colour);
    outline-offset: var(--pui-space-1);
}

.definitions-search__clear {
    position: absolute;
    right: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text_muted);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
}

.definitions-search__clear:hover {
    color: var(--text);
}

/* ── A–Z filter row ─────────────────────────────────────────────────────────── */
.definitions-az {
    margin-top: var(--space-5);
    margin-bottom: var(--space-5);
}

.definitions-az__chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    outline: none;
    margin-top: var(--space-3);
}

.definitions-az__clear-letter {
    margin-left: 0.5rem;
}

/* .learn-filter-chip and .learn-filter-chip.active already defined in site.css */
.learn-filter-chip.disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ── Definitions mode (in LearnHome embedded view) ──────────────────────────── */
.definitions-mode {
    margin-top: var(--space-5);
}

.definitions-mode__segments {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.definitions-mode .definitions-az__chips {
    margin-bottom: var(--space-5);
}

/* ── Definitions grid ───────────────────────────────────────────────────────── */
.definitions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-4);
}

/* ── Individual definition card ─────────────────────────────────────────────── */
.definition-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4) calc(var(--space-4) + 2px);
    border-radius: var(--pui-radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    text-decoration: none;
    color: var(--text);
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
    min-height: 90px;
}

.definition-card:hover {
    border-color: var(--accent);
    box-shadow: var(--pui-shadow-subtle);
    background: var(--surface_alt);
    text-decoration: none;
    color: var(--text);
}

.definition-card__term {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.3;
}

.definition-card__summary {
    font-size: 0.82rem;
    color: var(--text_muted);
    line-height: 1.5;
    display: -webkit-box;
    line-clamp: 3;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.definition-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    margin-top: auto;
    padding-top: var(--space-2);
}

/* ── Inline tags ────────────────────────────────────────────────────────────── */
.learn-tag {
    display: inline-block;
    background: var(--surface_alt);
    color: var(--text_muted);
    border-radius: 999px;
    padding: 0.1rem 0.55rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    white-space: nowrap;
    text-decoration: none;
}

.learn-tag:hover {
    background: var(--border);
    color: var(--text);
    text-decoration: none;
}

/* ── State messages ─────────────────────────────────────────────────────────── */
.definitions-loading,
.definitions-empty {
    color: var(--text_muted);
    padding: var(--space-7) 0;
    font-size: 0.95rem;
}

/* ── Load more ──────────────────────────────────────────────────────────────── */
.definitions-load-more {
    display: flex;
    justify-content: center;
    margin-top: var(--space-6);
}

button.learn-cta__button {
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
}

/* ── Definition detail article ──────────────────────────────────────────────── */
.definition-article__header {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.definition-article__term {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
}

.definition-article__summary {
    font-size: 1.05rem;
    color: var(--text_muted);
    line-height: 1.4;
    margin: 0 0 var(--space-2);
    white-space: pre-line;
}

.definition-article__body {
    font-size: 1.08rem;
    line-height: 1.5;
    color: var(--text);
    margin-bottom: var(--space-2);
}

.definition-article__body :is(h2, h3, h4) {
    margin: var(--space-2) 0 var(--space-1);
    line-height: 1.2;
}

.definition-article__body h2 {
    font-size: 1.55rem;
}

.definition-article__body h3 {
    font-size: 2rem;
    margin-top: var(--space-4);
}

.definition-article__body h4 {
    font-size: 1.25rem;
}

.definition-article__body :is(h2, h3, h4):first-child {
    margin-top: var(--space-3);
}

.definition-article__body p {
    margin: 0 0 var(--space-1);
}

.definition-article__body :is(ul, ol) {
    margin-top: 0;
    margin-bottom: var(--space-2);
}

.definition-article__body li + li {
    margin-top: var(--space-1);
}

.definition-article__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.definition-article__meta {
    font-size: 0.85rem;
    color: var(--text_muted);
    margin-top: var(--space-2);
}

/* ── Prev / next nav ────────────────────────────────────────────────────────── */
.definition-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-3) 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin: var(--space-4) 0 var(--space-4);
    flex-wrap: wrap;
}

.definition-nav__prev,
.definition-nav__next {
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
}

.definition-nav__prev:hover,
.definition-nav__next:hover {
    color: var(--accent);
    text-decoration: none;
}

.definition-nav__dir {
    font-size: 0.75rem;
    color: var(--text_muted);
    font-weight: 400;
}

.definition-nav__all {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
}

.definition-nav__all:hover {
    text-decoration: underline;
}

/* ── Learn badge difficulty ──────────────────────────────────────────────────── */
.learn-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    background: var(--surface_alt);
    color: var(--text_muted);
    border: 1px solid var(--border);
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .definitions-grid {
        grid-template-columns: 1fr;
    }

    .definitions-az__chips {
        gap: var(--space-1);
    }

    .learn-filter-chip {
        padding: 0.3rem 0.6rem;
        font-size: 0.78rem;
    }

    .definition-article__term {
        font-size: 1.55rem;
    }
}