/* =================================================================
   tools/fibonacci-lucas.css
   Auto-extracted from math.css (2026-05-11).
   Loaded via config/js-manifest.php → templates/partials/head-styles.php.
   ================================================================= */

/* ─── Fibonacci Sequence ──────────────────────── */
.math-fib-sequence {
    margin-top: 6px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.6;
    max-height: 200px;
    overflow-y: auto;
    word-break: break-all;
    color: var(--math-text, #e5e7eb);
}

/* ═══════════════════════════════════════════════════
   Fibonacci / Lucas — visuals
   ═══════════════════════════════════════════════════ */

.math-fib-summary-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--math-border-light);
    margin-bottom: 14px;
}
.math-fib-summary-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
    flex: 1 1 auto;
}
.math-fib-summary-label {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--math-text-muted);
    font-family: 'JetBrains Mono', monospace;
}
.math-fib-summary-value {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 18px;
    font-weight: 700;
    color: var(--math-text);
    word-break: break-all;
    line-height: 1.4;
}
.math-fib-summary-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.math-fib-type-badge,
.math-fib-digits-chip,
.math-fib-parity-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
    white-space: nowrap;
}
.math-fib-type-badge i,
.math-fib-digits-chip i { font-size: 10px; }
.math-fib-type-badge[data-type="fib"] {
    background: rgba(99, 102, 241, 0.12);
    color: #818cf8;
    border-color: rgba(99, 102, 241, 0.35);
}
.math-fib-type-badge[data-type="lucas"] {
    background: rgba(236, 72, 153, 0.12);
    color: #f472b6;
    border-color: rgba(236, 72, 153, 0.35);
}
.math-fib-digits-chip {
    background: rgba(148, 163, 184, 0.1);
    color: #cbd5e1;
    border-color: rgba(148, 163, 184, 0.3);
}
.math-fib-parity-chip[data-parity="even"] {
    background: rgba(16, 185, 129, 0.1);
    color: #6ee7b7;
    border-color: rgba(16, 185, 129, 0.3);
}
.math-fib-parity-chip[data-parity="odd"] {
    background: rgba(251, 146, 60, 0.1);
    color: #fdba74;
    border-color: rgba(251, 146, 60, 0.3);
}

.math-fib-recurrence {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.22);
    border-radius: 8px;
    margin-bottom: 16px;
}
.math-fib-recurrence-label {
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--math-text-muted);
}
.math-fib-recurrence-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 700;
    color: #a5b4fc;
}
.math-fib-recurrence-seed {
    font-size: 11px;
    color: var(--math-text-muted);
}
.math-fib-recurrence-seed code {
    font-family: 'JetBrains Mono', monospace;
    padding: 1px 5px;
    background: rgba(255,255,255,0.05);
    border-radius: 3px;
    color: var(--math-text);
}

.math-fib-section { margin-bottom: 18px; }
.math-fib-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--math-text-muted);
    margin-bottom: 10px;
}
.math-fib-section-title i { color: #a5b4fc; }

/* ─── Recurrence chain cascade ─── */
.math-fib-chain {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.math-fib-chain-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid transparent;
    min-width: 110px;
    text-align: center;
}
.math-fib-chain-node.is-prev,
.math-fib-chain-node.is-seed {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
}
.math-fib-chain-node.is-target {
    background: linear-gradient(135deg, rgba(99,102,241,0.18), rgba(16,185,129,0.18));
    border-color: rgba(16, 185, 129, 0.5);
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.25);
}
.math-fib-chain-index {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 800;
    color: var(--math-text-muted);
    letter-spacing: 0.03em;
}
.math-fib-chain-node.is-target .math-fib-chain-index { color: #a7f3d0; }
.math-fib-chain-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--math-text);
    word-break: break-all;
    max-width: 260px;
}
.math-fib-chain-op {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 800;
    color: #a5b4fc;
    padding: 0 4px;
}
.math-fib-chain-note {
    margin-top: 10px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--math-border-light);
    border-radius: 6px;
    font-size: 11px;
    color: var(--math-text-muted);
    line-height: 1.5;
}
.math-fib-chain-note i { color: #818cf8; margin-right: 4px; }
.math-fib-chain-note code {
    font-family: 'JetBrains Mono', monospace;
    padding: 1px 5px;
    background: rgba(255,255,255,0.05);
    border-radius: 3px;
    color: var(--math-text);
}

/* ─── Golden ratio panel ─── */
.math-fib-ratio-panel {
    padding: 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--math-border-light);
    border-radius: 10px;
}
.math-fib-ratio-row {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
}
.math-fib-ratio-cell {
    flex: 1 1 auto;
    min-width: 200px;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid transparent;
    text-align: center;
}
.math-fib-ratio-cell.is-computed {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
}
.math-fib-ratio-cell.is-phi {
    background: rgba(234, 179, 8, 0.1);
    border-color: rgba(234, 179, 8, 0.35);
}
.math-fib-ratio-label {
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--math-text-muted);
    margin-bottom: 4px;
    font-family: 'JetBrains Mono', monospace;
}
.math-fib-ratio-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 700;
    color: var(--math-text);
    word-break: break-all;
}
.math-fib-ratio-cell.is-phi .math-fib-ratio-value { color: #fcd34d; }
.math-fib-ratio-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: #a5b4fc;
    font-size: 11px;
    font-weight: 700;
}
.math-fib-ratio-arrow i { font-size: 18px; }
.math-fib-ratio-diff {
    margin-top: 10px;
    padding: 8px 10px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--math-border-light);
    border-radius: 6px;
    font-size: 12px;
    color: var(--math-text);
    text-align: center;
}
.math-fib-ratio-diff i { color: #818cf8; margin-right: 4px; }
.math-fib-ratio-diff code {
    font-family: 'JetBrains Mono', monospace;
    padding: 1px 5px;
    background: rgba(255,255,255,0.05);
    border-radius: 3px;
}
.math-fib-ratio-note {
    margin-top: 8px;
    font-size: 11px;
    color: var(--math-text-muted);
    line-height: 1.5;
}
.math-fib-ratio-note i { color: #818cf8; margin-right: 4px; }
.math-fib-ratio-empty {
    padding: 16px;
    text-align: center;
    color: var(--math-text-muted);
    font-size: 12px;
    font-style: italic;
}

/* ─── Preview grid (first ~13 terms with parity color) ─── */
.math-fib-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
    gap: 6px;
}
.math-fib-preview-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 8px 6px;
    border-radius: 8px;
    border: 1px solid transparent;
    position: relative;
}
.math-fib-preview-cell.is-even {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}
.math-fib-preview-cell.is-odd {
    background: rgba(251, 146, 60, 0.08);
    border-color: rgba(251, 146, 60, 0.25);
}
.math-fib-preview-cell.is-target {
    outline: 2px solid #a5b4fc;
    outline-offset: 1px;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}
.math-fib-preview-n {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 800;
    color: var(--math-text-muted);
    letter-spacing: 0.03em;
}
.math-fib-preview-v {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 700;
    color: var(--math-text);
}
.math-fib-preview-cell.is-even .math-fib-preview-v { color: #6ee7b7; }
.math-fib-preview-cell.is-odd .math-fib-preview-v { color: #fdba74; }
.math-fib-preview-note {
    margin-top: 10px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--math-border-light);
    border-radius: 6px;
    font-size: 11px;
    color: var(--math-text-muted);
    line-height: 1.5;
}
.math-fib-preview-note i { color: #818cf8; margin-right: 4px; }
.math-fib-preview-note code {
    font-family: 'JetBrains Mono', monospace;
    padding: 1px 5px;
    background: rgba(255,255,255,0.05);
    border-radius: 3px;
    color: var(--math-text);
}

/* ─── Binet / identities block ─── */
.math-fib-binet {
    padding: 14px;
    background: rgba(99, 102, 241, 0.04);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 10px;
}
.math-fib-binet-formula {
    text-align: center;
    margin-bottom: 10px;
}
.math-fib-binet-formula code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 18px;
    font-weight: 700;
    color: #a5b4fc;
    padding: 6px 14px;
    background: rgba(255,255,255,0.04);
    border-radius: 8px;
}
.math-fib-binet-consts {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 10px;
    padding: 8px 10px;
    background: rgba(255,255,255,0.03);
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--math-text-muted);
}
.math-fib-binet-const strong { color: #fcd34d; margin-right: 4px; }
.math-fib-binet-check,
.math-fib-identity {
    font-size: 12px;
    color: var(--math-text);
    line-height: 1.6;
    padding: 8px 10px;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--math-border-light);
    border-radius: 6px;
    margin-top: 8px;
}
.math-fib-binet-check i,
.math-fib-identity i { color: #818cf8; margin-right: 4px; }
.math-fib-binet-check code,
.math-fib-identity code {
    font-family: 'JetBrains Mono', monospace;
    padding: 1px 5px;
    background: rgba(255,255,255,0.05);
    border-radius: 3px;
    color: var(--math-text);
    font-size: 11px;
}

/* Mobile */
@media (max-width: 640px) {
    .math-fib-summary-value { font-size: 14px; }
    .math-fib-chain-node { min-width: 90px; padding: 8px 10px; }
    .math-fib-chain-value { font-size: 12px; max-width: 170px; }
    .math-fib-chain-op { font-size: 18px; }
    .math-fib-ratio-cell { min-width: 140px; padding: 10px; }
    .math-fib-ratio-value { font-size: 13px; }
    .math-fib-preview-grid { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
    .math-fib-preview-v { font-size: 12px; }
    .math-fib-binet-formula code { font-size: 14px; padding: 5px 10px; }
    .math-fib-binet-consts { gap: 10px; font-size: 10px; }
}