/* ============================================================
   CrossWord — flashcards.css
   Phase 8: Full-screen flashcard review overlay.
   ============================================================ */

/* ── Overlay ─────────────────────────────────────────────── */
.fc-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 700;
    background: var(--navy-deep);
    flex-direction: column;
}

.fc-overlay.open {
    display: flex;
}

/* ── Loading / Empty / Summary shared centred layout ─────── */
.fc-loading,
.fc-summary {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-lg);
    padding: var(--sp-xl);
    color: var(--text-on-navy);
    text-align: center;
    position: relative;
}

.fc-loading p,
.fc-summary p {
    color: rgba(237,227,207,0.7);
    max-width: 280px;
    font-size: 0.95rem;
}

.fc-summary-icon {
    font-size: 3rem;
    line-height: 1;
}

.fc-summary h2 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--parchment);
    letter-spacing: 0.06em;
}

.fc-summary-stats {
    display: flex;
    gap: var(--sp-xl);
    flex-wrap: wrap;
    justify-content: center;
    margin: var(--sp-sm) 0;
}

.fc-summary-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.fc-stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--gold-light);
    font-weight: 600;
    line-height: 1;
}

.fc-stat-label {
    font-size: 0.68rem;
    font-family: var(--font-display);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(237,227,207,0.55);
}

.fc-stat-promoted .fc-stat-value { color: var(--green); }

/* ── Session layout ──────────────────────────────────────── */
.fc-session {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
    padding: 0 0 var(--sp-md);
}

/* ── Header ──────────────────────────────────────────────── */
.fc-header {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    padding: var(--sp-md) var(--sp-md) var(--sp-sm);
}

.fc-close-btn {
    background: none;
    border: none;
    color: rgba(237,227,207,0.5);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: var(--r-sm);
    transition: color 0.15s;
    flex-shrink: 0;
    line-height: 1;
}

.fc-close-btn:hover { color: var(--parchment); }

.fc-progress {
    flex: 1;
    height: 4px;
    background: rgba(255,255,255,0.12);
    border-radius: var(--r-pill);
    overflow: hidden;
}

.fc-progress-fill {
    height: 100%;
    background: var(--gold);
    border-radius: var(--r-pill);
    transition: width 0.4s var(--ease-out);
}

.fc-counter {
    font-family: var(--font-display);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: rgba(237,227,207,0.5);
    flex-shrink: 0;
}

/* ── Card ────────────────────────────────────────────────── */
.fc-card-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-md);
}

.fc-card {
    width: 100%;
    max-width: 400px;
    min-height: 220px;
    background: var(--surface);
    border-radius: var(--r-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 40px rgba(0,0,0,0.4);
    border: 1px solid rgba(201,168,76,0.2);
    transition: transform 0.15s, box-shadow 0.15s;
    position: relative;
    overflow: hidden;
}

.fc-card:hover { transform: translateY(-2px); box-shadow: 0 12px 48px rgba(0,0,0,0.45); }
.fc-card:active { transform: scale(0.98); }

/* Card faces */
.fc-face {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--sp-xl);
    gap: var(--sp-sm);
    text-align: center;
}

/* Front */
.fc-front { background: var(--navy); }

.fc-source {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(201,168,76,0.6);
    position: absolute;
    top: var(--sp-md);
}

.fc-lemma {
    font-family: var(--font-greek);
    font-size: 3rem;
    color: var(--gold-light);
    line-height: 1.1;
}

.fc-tap-hint {
    font-family: var(--font-display);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(237,227,207,0.3);
    position: absolute;
    bottom: var(--sp-md);
}

/* Back */
.fc-back { background: var(--parchment); }

.fc-back-word {
    font-family: var(--font-greek);
    font-size: 1.4rem;
    color: var(--text-muted);
}

.fc-back-gloss {
    font-family: var(--font-body);
    font-size: 1.6rem;
    color: var(--navy);
    font-weight: 600;
}

.fc-back-meta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin-top: var(--sp-xs);
}

.fc-back-freq {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--navy-mid);
    background: rgba(27,58,107,0.08);
    padding: 2px 8px;
    border-radius: var(--r-pill);
}

.fc-back-ref,
.fc-back-occ {
    font-family: var(--font-display);
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* ── Rating buttons ──────────────────────────────────────── */
.fc-ratings {
    padding: var(--sp-sm) var(--sp-md) var(--sp-md);
}

.fc-rating-hint {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(237,227,207,0.4);
    text-align: center;
    margin-bottom: var(--sp-sm);
}

.fc-rating-row {
    display: flex;
    gap: var(--sp-xs);
}

.fc-rating-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 4px;
    border-radius: var(--r-md);
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.05);
    color: rgba(237,227,207,0.7);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s, border-color 0.15s;
    line-height: 1;
}

.fc-rating-btn span {
    font-size: 0.5rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.7;
    font-weight: 400;
}

.fc-rating-btn:hover:not(:disabled) {
    transform: translateY(-2px);
}

.fc-rating-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.fc-rating-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Rating colour coding */
.fc-r0 { border-color: rgba(139,32,32,0.5);  }
.fc-r0:hover:not(:disabled) { background: rgba(139,32,32,0.2);  border-color: #8B2020; }
.fc-r1 { border-color: rgba(181,116,10,0.4); }
.fc-r1:hover:not(:disabled) { background: rgba(181,116,10,0.15); }
.fc-r2 { border-color: rgba(181,116,10,0.4); }
.fc-r2:hover:not(:disabled) { background: rgba(181,116,10,0.15); }
.fc-r3 { border-color: rgba(44,95,168,0.4);  }
.fc-r3:hover:not(:disabled) { background: rgba(44,95,168,0.2);  }
.fc-r4 { border-color: rgba(46,125,79,0.5);  }
.fc-r4:hover:not(:disabled) { background: rgba(46,125,79,0.2);  border-color: #2E7D4F; }
.fc-r5 { border-color: rgba(201,168,76,0.6); }
.fc-r5:hover:not(:disabled) { background: rgba(201,168,76,0.2); border-color: var(--gold); color: var(--gold-light); }

/* ── Nav badge ───────────────────────────────────────────── */
.nav-badge {
    position: absolute;
    top: 4px;
    right: 10%;
    background: var(--gold);
    color: var(--navy-deep);
    font-family: var(--font-display);
    font-size: 0.5rem;
    font-weight: 700;
    min-width: 14px;
    height: 14px;
    border-radius: var(--r-pill);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 3px;
    line-height: 1;
}

/* Ensure nav buttons that hold badges are position:relative */
.nav-btn { position: relative; }

/* Fix: prevent display:flex on .fc-face from overriding the hidden attribute */
.fc-face[hidden] { display: none !important; }

/* ── Overlay centering fix ───────────────────────────────── */
.fc-overlay {
    align-items: center;
    justify-content: center;
}

/* ── Card 3D flip ────────────────────────────────────────── */
.fc-card {
    transform-style: preserve-3d;
    will-change: transform;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
    transition: box-shadow 0.2s;
    position: relative;
}
.fc-card:active { cursor: grabbing; }
.fc-card.fc-flipping {
    animation: cardFlipOut 0.2s ease-in forwards;
}
@keyframes cardFlipOut {
    0%   { transform: rotateY(0deg); }
    100% { transform: rotateY(90deg); }
}
.fc-face {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* ── Swipe hint overlay ──────────────────────────────────── */
.fc-swipe-hint {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    display: none;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #fff;
    pointer-events: none;
    transition: opacity 0.1s;
}

/* ── Mode tag ────────────────────────────────────────────── */
.fc-mode-tag {
    font-size: 0.6rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--gold);
    background: rgba(201,168,76,0.12);
    padding: 2px 8px;
    border-radius: var(--r-pill);
    margin-left: var(--sp-xs);
}

/* ── Familiarity label on front face ─────────────────────── */
.fc-last-rating {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-top: var(--sp-xs);
}

/* ── Unreviewed card (not yet in deck) ───────────────────── */
.fc-card.fc-unreviewed {
    border: 1px dashed rgba(201,168,76,0.4);
    opacity: 0.92;
}
.fc-unreviewed-note { font-size: 0.78rem; color: var(--text-muted); }
.fc-add-btn {
    background: none;
    border: 1px solid rgba(201,168,76,0.4);
    border-radius: var(--r-sm);
    color: var(--gold);
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    padding: 3px 8px;
    cursor: pointer;
    transition: background 0.15s;
}
.fc-add-btn:hover { background: rgba(201,168,76,0.1); }

/* ── Custom/passage drill: fc-custom-row (Learn page) ───── */
.fc-custom-row {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    margin-top: var(--sp-sm);
    flex-wrap: wrap;
    justify-content: center;
}
.fc-custom-label { font-size: 0.78rem; color: var(--text-muted); }
.fc-custom-select {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(201,168,76,0.25);
    border-radius: var(--r-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.8rem;
    padding: 4px 8px;
    cursor: pointer;
}

/* ── Passage drill selector (Learn page) ─────────────────── */
.fc-passage-drill {
    margin-top: var(--sp-md);
    padding-top: var(--sp-sm);
    border-top: 1px solid var(--border-light);
    width: 100%;
    text-align: left;
}
.fc-passage-drill-label {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--sp-xs);
}
.fc-passage-drill .selector-select {
    background: var(--navy-deep);
    color: var(--text-on-navy);
    border-color: rgba(201,168,76,0.3);
}
.fc-verse-range {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    margin-top: var(--sp-xs);
}
.fc-range-label { font-size: 0.78rem; color: var(--text-muted); flex-shrink: 0; }

/* ── Learn page persistent drill footer ──────────────────── */
.learn-drill-footer {
    position: sticky;
    bottom: 0;
    background: var(--navy-deep);
    border-top: 1px solid rgba(201,168,76,0.25);
    padding: var(--sp-sm) var(--sp-md);
    display: flex;
    flex-direction: column;
    gap: var(--sp-xs);
    z-index: 50;
}
.learn-drill-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--sp-xs);
}
.learn-drill-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--parchment);
}
.learn-drill-due { font-size: 0.72rem; color: rgba(237,227,207,0.6); }
.learn-drill-row {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    flex-wrap: wrap;
}
.learn-drill-sep { font-size: 0.72rem; color: rgba(237,227,207,0.45); }
.learn-drill-footer .btn-ghost {
    color: rgba(237,227,207,0.85);
    border-color: rgba(237,227,207,0.3);
}
.learn-drill-footer .btn-ghost:hover {
    background: rgba(237,227,207,0.1);
    color: var(--parchment);
}