/* ==============================================================================
 * Mentifyll: „📚 Tanulás” nézet — tantárgy → fejezet → tananyag accordion,
 * vázlat/kártyák/kvíz fülek, kártya-SRS gyakorlás modál.
 * Minden szín a tokens.css változóiból (sötét és világos téma is, WCAG AA).
 * ============================================================================== */

/* ---------- Közös elemek ---------- */
.std-intro {
    margin: 0 0 12px;
    font-size: 0.86rem;
    line-height: 1.5;
    color: var(--color-card-text);
}

.std-hint {
    margin: 6px 0;
    font-size: 0.82rem;
    line-height: 1.45;
    color: var(--color-card-text);
}

.std-error {
    margin: 10px 0;
    color: var(--danger-fg);
    font-weight: 700;
}

.std-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 32px 16px;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    color: var(--color-card-text);
    text-align: center;
}

.std-empty > span {
    font-size: 1.8rem;
}

.std-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 9px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    color: var(--color-card-text);
    font-size: 0.74rem;
    font-weight: 700;
    white-space: nowrap;
}

/* ---------- Tantárgy → fejezet → tananyag accordion ---------- */
.std-subject-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.std-subject {
    border: 1px solid var(--color-border);
    border-left: 5px solid var(--std-subject, var(--color-primary));
    border-radius: var(--radius-md);
    background: var(--color-surface);
    overflow: hidden;
}

.std-subject-head {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 14px;
    border: 0;
    background: transparent;
    color: var(--color-text-main);
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.std-subject-head:hover {
    background: var(--color-surface-hover);
}

.std-subject-icon {
    font-size: 1.3rem;
}

.std-subject-name {
    flex: 1 1 auto;
    min-width: 0;
    font-weight: 800;
    color: var(--color-heading);
    overflow-wrap: anywhere;
}

.std-subject-chevron {
    flex: 0 0 auto;
    color: var(--color-card-text);
}

.std-unit-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0 10px 10px;
}

.std-unit {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-hover);
    overflow: hidden;
}

.std-unit-head {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    width: 100%;
    padding: 10px 12px;
    border: 0;
    background: transparent;
    color: var(--color-text-main);
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.std-unit-head:hover {
    background: var(--color-surface);
}

.std-unit-name {
    flex: 1 1 auto;
    min-width: 0;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.std-unit-stats {
    display: flex;
    gap: 6px;
    flex: 0 0 auto;
}

.std-material-list {
    padding: 0 12px 10px;
}

.std-material-items {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.std-material-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-main);
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.std-material-btn:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
}

.std-material-title {
    font-weight: 700;
}

.std-material-meta {
    font-size: 0.78rem;
    color: var(--color-card-text);
}

/* ---------- Modál (a missions.js std- prefixű ikertestvére) ---------- */
.std-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 3100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: rgba(2, 6, 23, 0.62);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.std-modal {
    display: flex;
    flex-direction: column;
    width: min(560px, 100%);
    max-height: calc(100vh - 32px);
    max-height: calc(100dvh - 32px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
    outline: none;
}

.std-modal.is-wide {
    width: min(820px, 100%);
}

.std-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
}

.std-modal-head h3 {
    margin: 0;
    font-size: 1.05rem;
    color: var(--color-heading);
    overflow-wrap: anywhere;
}

.std-modal-close {
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: transparent;
    color: var(--color-text-main);
    cursor: pointer;
}

.std-modal-body {
    padding: 14px 16px 18px;
    overflow-y: auto;
    overscroll-behavior: contain;
}

/* ---------- Tananyag-nézet fülek (Vázlat / Kártyák / Kvíz) ---------- */
.std-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
}

.std-tab {
    flex: 0 0 auto;
    padding: 9px 14px;
    border: 0;
    border-bottom: 3px solid transparent;
    background: transparent;
    color: var(--color-card-text);
    font: inherit;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
}

.std-tab:hover {
    color: var(--color-text-main);
}

.std-tab.is-active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary);
}

.std-tab-pane[hidden] {
    display: none;
}

.std-outline {
    line-height: 1.6;
}

.std-book-btn {
    margin-bottom: 12px;
}

.std-start-practice {
    width: 100%;
    margin-bottom: 14px;
}

/* ---------- Kártya-rács (előnézet) ---------- */
.std-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
}

.std-card-preview {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 110px;
    padding: 12px 10px 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-hover);
    text-align: center;
    cursor: pointer;
}

.std-card-preview:hover {
    border-color: var(--color-primary);
}

.std-card-front,
.std-card-back {
    width: 100%;
    font-size: 0.92rem;
}

.std-card-back {
    padding-top: 6px;
    border-top: 1px dashed var(--color-border);
    color: var(--color-primary);
}

.std-card-back small {
    display: block;
    margin-top: 4px;
    color: var(--color-card-text);
    font-weight: 400;
}

.std-card-media img {
    max-width: 100%;
    max-height: 90px;
    border-radius: var(--radius-sm);
    object-fit: contain;
}

.std-card-flip-hint {
    position: absolute;
    bottom: 4px;
    left: 0;
    right: 0;
    font-size: 0.68rem;
    font-style: normal;
    color: var(--color-card-text);
    opacity: 0.75;
}

.std-speak-btn {
    align-self: flex-end;
    padding: 2px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    color: var(--color-text-main);
    font-size: 0.8rem;
    cursor: pointer;
}

/* ---------- Kvíz-előnézet ---------- */
.std-quiz-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.std-quiz-item {
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-hover);
}

.std-quiz-head {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
}

.std-quiz-prompt {
    line-height: 1.5;
}

.std-quiz-note {
    margin-top: 10px;
    text-align: center;
}

/* ---------- Kártya-SRS gyakorlás (fordítás + önértékelés) ---------- */
.std-practice-progress {
    margin-bottom: 10px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-card-text);
    text-align: center;
}

.std-practice-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-height: 160px;
    padding: 24px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface-hover);
    text-align: center;
}

.std-practice-front {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-heading);
}

.std-practice-back {
    width: 100%;
    padding-top: 10px;
    border-top: 1px dashed var(--color-border);
    font-size: 1.1rem;
    color: var(--color-primary);
}

.std-practice-back small {
    display: block;
    margin-top: 6px;
    color: var(--color-card-text);
    font-weight: 400;
}

.std-flip-btn {
    display: block;
    width: 100%;
    margin-top: 14px;
}

.std-rating-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 14px;
}

.std-rating-row > .std-hint {
    grid-column: 1 / -1;
    margin: 0 0 2px;
    text-align: center;
}

.std-rate {
    padding: 10px 6px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-main);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.std-rate:disabled {
    opacity: 0.55;
    cursor: default;
}

.std-rate.is-bad { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger-fg); }
.std-rate.is-warn { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning-fg); }
.std-rate.is-ok { background: var(--success-bg); border-color: var(--success-border); color: var(--success-fg); }
.std-rate.is-great { background: var(--info-bg); border-color: var(--info-border); color: var(--info-fg); }

.std-rate:not(:disabled):hover {
    filter: brightness(1.08);
}

.std-practice-summary {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 20px 10px;
    text-align: center;
}

.std-summary-emoji {
    margin: 0;
    font-size: 2.4rem;
}

.std-practice-summary h4 {
    margin: 0;
    color: var(--color-heading);
}

.std-practice-summary .btn {
    margin-top: 10px;
    width: min(220px, 100%);
}

/* ---------- Reszponzivitás ---------- */
@media (max-width: 600px) {
    .std-modal-backdrop {
        align-items: flex-end;
        padding: 0;
    }

    .std-modal,
    .std-modal.is-wide {
        width: 100%;
        max-height: 94vh;
        max-height: 94dvh;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .std-rating-row {
        grid-template-columns: minmax(0, 1fr);
    }

    .std-card-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    .std-rate {
        transition: none;
    }
}

@media print {
    .std-modal-backdrop {
        display: none !important;
    }
}