/* Eğitir subject discovery — derived from the public curriculum catalogue. */
.knowledge-discovery,
.knowledge-library-filter,
.knowledge-related {
    --knowledge-ink: var(--v2-ink, var(--flow-ink, #111c19));
    --knowledge-muted: var(--v2-muted, #5a645d);
    --knowledge-line: var(--v2-line, var(--flow-line, #d8d8ce));
    --knowledge-line-strong: var(--v2-line-strong, var(--flow-line-strong, #aaa99f));
    --knowledge-paper: var(--v2-paper, var(--flow-paper, #f8f5ec));
    --knowledge-surface: var(--v2-surface, var(--flow-surface, #fffdfa));
    --knowledge-lime: var(--v2-lime, var(--flow-lime, #c9f000));
}

.knowledge-discovery [hidden],
.knowledge-library-filter [hidden],
.knowledge-related [hidden] { display: none !important; }

.knowledge-discovery {
    margin: 30px 0 44px;
    padding: clamp(20px, 3vw, 34px);
    border: 1px solid var(--knowledge-line-strong);
    border-radius: 24px;
    background:
        radial-gradient(circle at 95% 0, rgba(201, 240, 0, .17), transparent 17rem),
        var(--knowledge-surface);
}

.knowledge-discovery__heading {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(260px, .7fr);
    gap: 24px;
    align-items: end;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--knowledge-line);
}

.knowledge-discovery__heading h2,
.knowledge-library-filter__tools h2,
.knowledge-related h2 {
    margin: 7px 0 0;
    color: var(--knowledge-ink);
    font-size: clamp(25px, 3vw, 39px);
    line-height: 1.05;
    letter-spacing: -.045em;
    text-wrap: balance;
}

.knowledge-discovery__heading > p,
.knowledge-library-filter__tools > div > p,
.knowledge-related > div > p {
    margin: 0;
    color: var(--knowledge-muted);
    font-size: 14px;
    line-height: 1.7;
}

.knowledge-discovery__tools,
.knowledge-library-filter__fields {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: end;
}

.knowledge-discovery__tools { margin-top: 22px; }
.knowledge-discovery__tools > label { flex: 1 1 300px; }
.knowledge-discovery__tools label,
.knowledge-library-filter__fields label {
    display: grid;
    gap: 7px;
    color: var(--knowledge-ink);
    font-size: 12px;
    font-weight: 800;
}

.knowledge-discovery__tools input,
.knowledge-library-filter__fields :is(input, select) {
    width: 100%;
    min-height: 48px;
    padding: 10px 13px;
    border: 1px solid var(--knowledge-line-strong);
    border-radius: 12px;
    color: var(--knowledge-ink);
    background: #fff;
    font: inherit;
}

.knowledge-discovery__tools :is(input, button):focus-visible,
.knowledge-library-filter__fields :is(input, select):focus-visible,
.knowledge-subject-card a:focus-visible,
.knowledge-related a:focus-visible {
    outline: 3px solid var(--knowledge-ink);
    outline-offset: 3px;
}

.knowledge-discovery__tools fieldset {
    flex: 2 1 440px;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

.knowledge-discovery__tools legend {
    margin-bottom: 7px;
    color: var(--knowledge-ink);
    font-size: 12px;
    font-weight: 800;
}

.knowledge-discovery__scope-buttons { display: flex; flex-wrap: wrap; gap: 7px; }
.knowledge-discovery__scope-buttons button {
    min-height: 44px;
    padding: 9px 14px;
    border: 1px solid var(--knowledge-line-strong);
    border-radius: 999px;
    color: var(--knowledge-ink);
    background: transparent;
    font: inherit;
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
}
.knowledge-discovery__scope-buttons button[aria-pressed="true"] {
    border-color: var(--knowledge-ink);
    background: var(--knowledge-ink);
    color: #fff;
}

.knowledge-discovery__result {
    margin: 18px 0 10px;
    color: var(--knowledge-muted);
    font-size: 12px;
    font-weight: 750;
}

.knowledge-discovery__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 13px;
}

.knowledge-subject-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 270px;
    padding: 19px;
    border: 1px solid var(--knowledge-line);
    border-radius: 17px;
    background: rgba(255, 255, 255, .72);
}

.knowledge-subject-card > header {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 11px;
    align-items: center;
}
.knowledge-subject-card > header > span {
    display: grid;
    width: 38px;
    aspect-ratio: 1;
    place-items: center;
    border-radius: 11px;
    background: var(--knowledge-lime);
    color: var(--knowledge-ink);
    font-size: 11px;
    font-weight: 900;
}
.knowledge-subject-card header p { margin: 0 0 3px; color: var(--knowledge-muted); font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.knowledge-subject-card h3 { margin: 0; color: var(--knowledge-ink); font-size: 20px; letter-spacing: -.025em; }
.knowledge-subject-card dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 17px 0 14px; }
.knowledge-subject-card dl div { min-width: 0; padding: 9px; border-radius: 10px; background: var(--knowledge-paper); }
.knowledge-subject-card dt { color: var(--knowledge-muted); font-size: 9px; font-weight: 800; }
.knowledge-subject-card dd { margin: 4px 0 0; color: var(--knowledge-ink); font-size: 18px; font-weight: 900; }
.knowledge-subject-card nav { display: flex; flex-wrap: wrap; gap: 6px; }
.knowledge-subject-card nav a {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    padding: 7px 10px;
    border: 1px solid var(--knowledge-line);
    border-radius: 999px;
    color: var(--knowledge-ink);
    background: #fff;
    font-size: 11px;
    font-weight: 850;
}
.knowledge-subject-card nav a:hover { border-color: var(--knowledge-ink); }
.knowledge-subject-card > small { margin-top: auto; padding-top: 15px; color: var(--knowledge-muted); line-height: 1.5; }

.knowledge-discovery__empty {
    margin-top: 13px;
    padding: 20px;
    border: 1px dashed var(--knowledge-line-strong);
    border-radius: 14px;
    background: var(--knowledge-paper);
}
.knowledge-discovery__empty strong { color: var(--knowledge-ink); }
.knowledge-discovery__empty p { margin: 5px 0 0; color: var(--knowledge-muted); }

/* Grade + subject libraries keep all canonical content in the HTML. */
.knowledge-library-filter__tools {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, .9fr);
    gap: 24px;
    align-items: end;
    margin: 25px 0 8px;
    padding: 20px;
    border: 1px solid var(--knowledge-line);
    border-radius: 17px;
    background: var(--knowledge-surface);
}
.knowledge-library-filter__tools h2 { font-size: clamp(23px, 2.5vw, 31px); }
.knowledge-library-filter__fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.knowledge-library-filter__fields label:only-child { grid-column: 1 / -1; }

/* Topic metadata is factual: curriculum context, duration and revision date. */
.knowledge-topic-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin: 19px 0 5px;
    padding: 0;
    list-style: none;
}
.knowledge-topic-meta li {
    display: grid;
    gap: 2px;
    min-width: 92px;
    padding: 9px 12px;
    border: 1px solid var(--knowledge-line);
    border-radius: 11px;
    background: var(--knowledge-surface);
}
.knowledge-topic-meta span { color: var(--knowledge-muted); font-size: 9px; font-weight: 850; letter-spacing: .045em; text-transform: uppercase; }
.knowledge-topic-meta strong { color: var(--knowledge-ink); font-size: 12px; overflow-wrap: anywhere; }

.knowledge-related {
    margin-top: 27px;
    padding-top: 27px;
    border-top: 1px solid var(--knowledge-line);
}
.knowledge-related > div:first-child { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .65fr); gap: 20px; align-items: end; }
.knowledge-related h2 { font-size: clamp(24px, 3vw, 34px); }
.knowledge-related__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 17px; }
.knowledge-related__grid article { display: flex; min-height: 170px; flex-direction: column; padding: 17px; border: 1px solid var(--knowledge-line); border-radius: 15px; background: var(--knowledge-surface); }
.knowledge-related__grid article > span { color: var(--knowledge-muted); font-size: 10px; font-weight: 900; }
.knowledge-related__grid h3 { margin: 16px 0; font-size: 17px; line-height: 1.25; }
.knowledge-related__grid h3 a { color: var(--knowledge-ink); }
.knowledge-related__grid article > a { display: inline-flex; min-height: 44px; gap: 8px; align-items: center; margin-top: auto; color: var(--knowledge-ink); font-size: 12px; font-weight: 850; }

@media (max-width: 900px) {
    .knowledge-discovery__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .knowledge-discovery__heading,
    .knowledge-library-filter__tools,
    .knowledge-related > div:first-child { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    .knowledge-discovery { margin: 20px 0 34px; padding: 17px; border-radius: 18px; }
    .knowledge-discovery__grid,
    .knowledge-related__grid,
    .knowledge-library-filter__fields { grid-template-columns: 1fr; }
    .knowledge-subject-card { min-height: 0; }
    .knowledge-discovery__scope-buttons { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .knowledge-discovery__scope-buttons button { width: 100%; }
    .knowledge-topic-meta li { flex: 1 1 calc(50% - 7px); }
}

@media (prefers-reduced-motion: no-preference) {
    .knowledge-subject-card,
    .knowledge-related__grid article { transition: transform 160ms ease, border-color 160ms ease; }
    .knowledge-subject-card:hover,
    .knowledge-related__grid article:hover { transform: translateY(-2px); border-color: var(--knowledge-line-strong); }
}