/* ===================================================================
   Murabaha Calculator — Tool ID 15
   Scoped under .mrb-section. Reuses design-system tokens (tokens.css)
   with literal fallbacks so colours stay brand-correct even if the
   token layer is absent. RTL-first, no inline styles (Rule: zero inline).
   =================================================================== */

.mrb-section {
    --mrb-navy:        var(--navy, #152D50);
    --mrb-navy-2:      var(--navy-light, #1A3456);
    --mrb-teal:        var(--teal, #0E7C7B);
    --mrb-teal-bg:     var(--teal-bg, #EBF7F7);
    --mrb-gold:        var(--gold, #C08A2E);
    --mrb-gold-bg:     var(--gold-bg, #FAF3E5);
    --mrb-surface:     #ffffff;
    --mrb-bg:          var(--surface-2, #f5f7fa);
    --mrb-border:      var(--border, #DDE5EF);
    --mrb-border-soft: var(--border-soft, #E8EFF8);
    --mrb-text-1:      var(--navy, #152D50);
    --mrb-text-2:      #3a4a5e;
    --mrb-text-3:      #5d6a7e; /* WCAG AA: 5.4:1 on #fff (was #6b7a90 = 4.38:1) */
    --mrb-danger:      var(--danger, #b91c1c);
    --mrb-warning-bg:  var(--warning-bg, #FFFBEB);
    --mrb-warning-tx:  #92400e;
    --mrb-radius:      var(--radius-lg, 14px);
    --mrb-radius-sm:   var(--radius-md, 8px);
    --mrb-shadow:      var(--shadow-md, 0 2px 16px rgba(21, 45, 80, .08));
    display: block;
    color: var(--mrb-text-1);
    font-size: 15px;
}
.mrb-section * { box-sizing: border-box; }

/* ── HERO ── */
.mrb-hero {
    background: linear-gradient(135deg, var(--mrb-navy) 0%, var(--mrb-navy-2) 100%);
    border-radius: var(--mrb-radius);
    padding: 40px 24px;
    text-align: center;
    margin-block: 8px 24px;
}
.mrb-hero h1 {
    color: #fff;
    font-size: clamp(22px, 4vw, 32px);
    font-weight: 800;
    margin-block-end: 10px;
}
.mrb-hero-desc {
    color: rgba(255, 255, 255, .82);
    font-size: 15px;
    max-width: 560px;
    margin: 0 auto 24px;
    line-height: 1.7;
}
.mrb-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(201, 168, 76, .18);
    border: 1px solid rgba(201, 168, 76, .4);
    color: #E5C77A;
    border-radius: 20px;
    padding: 5px 14px;
    font-size: 12.5px;
    margin-block-end: 16px;
}
.mrb-hero-stats {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.mrb-hero-stat {
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--mrb-radius-sm);
    padding: 10px 20px;
    text-align: center;
}
.mrb-hero-stat strong { display: block; color: #E5C77A; font-size: 16px; font-weight: 800; }
.mrb-hero-stat span { color: rgba(255, 255, 255, .7); font-size: 11.5px; }

/* ── LAYOUT ── */
.mrb-main { padding-block-end: 32px; }
.mrb-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 24px;
    align-items: start;
}
/* min-width:0 lets grid children shrink so the nowrap schedule table
   scrolls inside .mrb-sched-wrap instead of blowing out the layout. */
.mrb-form-col,
.mrb-result-col { min-width: 0; }
@media (max-width: 900px) {
    .mrb-grid { grid-template-columns: minmax(0, 1fr); }
    .mrb-result-col { order: -1; }
}

/* ── INFO BOX ── */
.mrb-info-box {
    background: var(--mrb-gold-bg);
    border: 1px solid var(--border-gold, rgba(201, 168, 76, .3));
    border-radius: var(--mrb-radius-sm);
    padding: 14px 18px;
    font-size: 13.5px;
    color: #5a4020;
    line-height: 1.7;
    margin-block-end: 22px;
}
.mrb-info-box strong { display: block; margin-block-end: 4px; color: #3d2a10; }
.mrb-info-box p { margin: 0; }
.mrb-info-box p + p { margin-block-start: 6px; }

/* ── CARDS ── */
.mrb-card {
    background: var(--mrb-surface);
    border-radius: var(--mrb-radius);
    box-shadow: var(--mrb-shadow);
    border: 1px solid var(--mrb-border-soft);
    margin-block-end: 20px;
}
.mrb-card-head {
    padding: 18px 22px 14px;
    border-block-end: 1px solid var(--mrb-border-soft);
    display: flex;
    align-items: center;
    gap: 10px;
}
.mrb-card-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--mrb-teal-bg);
    color: var(--mrb-teal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.mrb-card-title { font-size: 15px; font-weight: 700; color: var(--mrb-text-1); margin: 0; }
.mrb-card-sub { font-size: 12px; color: var(--mrb-text-3); margin: 2px 0 0; }
.mrb-card-body { padding: 20px 22px; }

/* ── FIELDS ── */
.mrb-field { margin-block-end: 18px; }
.mrb-field:last-child { margin-block-end: 0; }
.mrb-field > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--mrb-text-2);
    margin-block-end: 7px;
}
.mrb-hint { font-weight: 400; color: var(--mrb-text-3); font-size: 11.5px; margin-inline-start: 6px; }
.mrb-input-wrap { position: relative; }
.mrb-input-wrap input {
    width: 100%;
    border: 1.5px solid var(--mrb-border);
    border-radius: var(--mrb-radius-sm);
    padding-block: 11px;
    padding-inline: 14px 48px;
    font-family: inherit;
    font-size: 15px;
    color: var(--mrb-text-1);
    background: #fff;
    transition: border-color .15s, box-shadow .15s;
    appearance: none;
}
.mrb-input-wrap input:focus {
    outline: none;
    border-color: var(--mrb-teal);
    box-shadow: 0 0 0 3px rgba(14, 124, 123, .12);
}
.mrb-input-unit {
    position: absolute;
    top: 50%;
    inset-inline-end: 14px;
    transform: translateY(-50%);
    font-size: 12px;
    color: var(--mrb-text-3);
    pointer-events: none;
    font-weight: 700;
}

/* ── CHIPS ── */
.mrb-chip-group { display: flex; flex-wrap: wrap; gap: 8px; margin-block-end: 10px; }
.mrb-chip {
    padding: 8px 18px;
    min-height: 40px;
    border-radius: 20px;
    border: 1.5px solid var(--mrb-border);
    background: var(--mrb-bg);
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    color: var(--mrb-text-2);
    transition: all .15s;
    user-select: none;
}
.mrb-chip:hover { border-color: var(--mrb-teal); color: var(--mrb-teal); background: var(--mrb-teal-bg); }
.mrb-chip.active { border-color: var(--mrb-teal); background: var(--mrb-teal-bg); color: var(--mrb-teal); font-weight: 700; }

.mrb-rate-presets { display: flex; gap: 6px; flex-wrap: wrap; margin-block-end: 10px; }
.mrb-rate-chip {
    padding: 6px 14px;
    min-height: 36px;
    border-radius: 12px;
    border: 1px solid var(--mrb-border);
    background: var(--mrb-bg);
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    color: var(--mrb-text-3);
    transition: all .15s;
    user-select: none;
}
.mrb-rate-chip:hover,
.mrb-rate-chip.active { border-color: var(--mrb-gold); background: var(--mrb-gold-bg); color: #7a5c00; }

/* ── FINANCE SUMMARY ── */
.mrb-finance-summary {
    background: linear-gradient(135deg, var(--mrb-teal-bg), #f0fafa);
    border: 1.5px solid rgba(14, 124, 123, .2);
    border-radius: var(--mrb-radius-sm);
    padding: 14px 18px;
    margin-block-start: 4px;
    display: none;
}
.mrb-finance-summary.show { display: block; }
.mrb-fs-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block: 5px;
    border-block-end: 1px dashed rgba(14, 124, 123, .15);
}
.mrb-fs-row:last-child { border-block-end: none; padding-block-end: 0; }
.mrb-fs-label { font-size: 12.5px; color: var(--mrb-text-3); }
.mrb-fs-value { font-size: 14px; font-weight: 700; color: var(--mrb-teal); }

/* ── BUTTONS ── */
.mrb-btn-calc {
    width: 100%;
    padding: 14px;
    background: var(--mrb-teal);
    color: #fff;
    border: none;
    border-radius: var(--mrb-radius-sm);
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: background .15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.mrb-btn-calc:hover { background: #0a6362; }
.mrb-btn-reset {
    width: 100%;
    padding: 11px;
    background: transparent;
    color: var(--mrb-text-3);
    border: 1.5px solid var(--mrb-border);
    border-radius: var(--mrb-radius-sm);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    margin-block-start: 8px;
    transition: all .15s;
}
.mrb-btn-reset:hover { border-color: var(--mrb-danger); color: var(--mrb-danger); }

/* ── SCHEDULE TABLE ── */
.mrb-sched-wrap { overflow-x: auto; }
.mrb-sched-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.mrb-sched-table th {
    background: var(--mrb-navy);
    color: #fff;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 700;
    text-align: center;
    white-space: nowrap;
}
.mrb-sched-table td {
    padding: 9px 14px;
    text-align: center;
    border-block-end: 1px solid var(--mrb-border-soft);
    color: var(--mrb-text-2);
}
.mrb-sched-table .mrb-sched-total td {
    background: var(--mrb-teal-bg);
    font-weight: 700;
    color: var(--mrb-teal);
    border-block-end: none;
}
.mrb-sched-table .mrb-profit-cell { color: var(--mrb-teal); font-weight: 600; }
.mrb-sched-empty { text-align: center; padding: 28px 12px; color: var(--mrb-text-3); }
.mrb-sched-note {
    font-size: 12px;
    color: var(--mrb-text-3);
    padding-block-start: 10px;
    text-align: center;
    display: none;
}
.mrb-sched-note.show { display: block; }

/* ── FORMULA SECTION ── */
.mrb-formula-section { margin-block-start: 8px; margin-block-end: 24px; }
.mrb-section-title {
    font-size: 17px;
    font-weight: 800;
    color: var(--mrb-text-1);
    margin-block-end: 16px;
    padding-block-end: 10px;
    border-block-end: 2px solid var(--mrb-border);
    display: flex;
    align-items: center;
    gap: 8px;
}
.mrb-formula-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .mrb-formula-grid { grid-template-columns: 1fr; } }
.mrb-formula-card {
    background: var(--mrb-surface);
    border: 1.5px solid var(--mrb-border);
    border-radius: var(--mrb-radius-sm);
    padding: 14px 16px;
}
.mrb-fc-label {
    font-size: 11.5px;
    color: var(--mrb-text-3);
    margin-block-end: 6px;
    font-weight: 700;
    letter-spacing: .3px;
}
.mrb-fc-formula {
    font-size: 13px;
    color: var(--mrb-text-1);
    background: var(--mrb-bg);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: 'Courier New', monospace;
    text-align: left;
}
.mrb-formula-note { font-size: 12px; color: var(--mrb-text-3); margin-block-start: 12px; line-height: 1.7; }

/* ── DISTINCTION BOX ── */
.mrb-distinction {
    background: var(--mrb-surface);
    border: 1.5px solid var(--mrb-border);
    border-radius: var(--mrb-radius);
    overflow: hidden;
    margin-block-end: 24px;
}
.mrb-db-head {
    background: linear-gradient(135deg, var(--mrb-navy-2), var(--mrb-navy));
    color: #fff;
    padding: 15px 20px;
    font-size: 15px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}
.mrb-db-body { display: grid; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .mrb-db-body { grid-template-columns: 1fr; } }
.mrb-db-col { padding: 18px 20px; }
.mrb-db-col:first-child { border-inline-end: 1px solid var(--mrb-border); }
.mrb-db-col-title { font-size: 13px; font-weight: 700; margin-block-end: 12px; }
.mrb-db-col-title.riba { color: var(--mrb-danger); }
.mrb-db-col-title.murabaha { color: var(--mrb-teal); }
.mrb-db-list { list-style: none; margin: 0; padding: 0; }
.mrb-db-list li {
    font-size: 13px;
    color: var(--mrb-text-2);
    padding-block: 5px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}
.mrb-db-list li::before { content: '✗'; color: var(--mrb-danger); font-weight: 800; flex-shrink: 0; }
.mrb-db-list.good li::before { content: '✓'; color: var(--mrb-teal); }

/* ── FAQ ── */
.mrb-faq-section { margin-block-end: 8px; }
.mrb-faq-item {
    border: 1px solid var(--mrb-border);
    border-radius: var(--mrb-radius-sm);
    margin-block-end: 8px;
    overflow: hidden;
}
.mrb-faq-q {
    width: 100%;
    padding: 14px 18px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    background: var(--mrb-surface);
    border: none;
    font-family: inherit;
    color: var(--mrb-text-1);
    text-align: start;
}
.mrb-faq-q:hover { background: var(--mrb-bg); }
.mrb-faq-arrow { transition: transform .2s; color: var(--mrb-text-3); font-size: 11px; flex-shrink: 0; }
.mrb-faq-a {
    padding-inline: 18px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s, padding .25s;
    background: var(--mrb-bg);
    font-size: 13.5px;
    color: var(--mrb-text-2);
    line-height: 1.75;
}
.mrb-faq-item.open .mrb-faq-arrow { transform: rotate(180deg); }
.mrb-faq-item.open .mrb-faq-a { max-height: 420px; padding-block: 14px; }

/* ── RESULT SIDEBAR ── */
.mrb-result-card { position: sticky; top: 20px; }
.mrb-result-head {
    padding: 18px 22px 14px;
    border-block-end: 1px solid var(--mrb-border-soft);
    display: flex;
    align-items: center;
    gap: 10px;
}
.mrb-result-icon { font-size: 22px; }
.mrb-result-title { font-size: 15px; font-weight: 800; color: var(--mrb-text-1); margin: 0; }
.mrb-result-body { padding: 20px 22px; }

.mrb-result-empty { text-align: center; padding: 28px 0; color: var(--mrb-text-3); font-size: 13.5px; line-height: 1.8; }
.mrb-result-empty.hidden { display: none; }
.mrb-re-icon { font-size: 40px; margin-block-end: 10px; }

.mrb-result-data { display: none; }
.mrb-result-data.show { display: block; }

.mrb-inst-box {
    background: linear-gradient(135deg, var(--mrb-navy) 0%, var(--mrb-navy-2) 100%);
    border-radius: var(--mrb-radius);
    padding: 20px;
    margin-block-end: 16px;
    text-align: center;
}
.mrb-inst-label { color: rgba(255, 255, 255, .65); font-size: 12px; margin-block-end: 6px; }
.mrb-inst-amount { color: #fff; font-size: 28px; font-weight: 800; letter-spacing: -.5px; }
.mrb-inst-period { color: #E5C77A; font-size: 12px; margin-block-start: 4px; }

.mrb-rb-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-block: 10px;
    border-block-end: 1px solid var(--mrb-border-soft);
    font-size: 13.5px;
}
.mrb-rb-row:last-child { border-block-end: none; }
.mrb-rb-label { color: var(--mrb-text-3); }
.mrb-rb-label.mrb-strong { font-weight: 700; color: var(--mrb-text-2); }
.mrb-rb-value { font-weight: 700; color: var(--mrb-text-1); }
.mrb-rb-value.accent { color: var(--mrb-teal); }
.mrb-rb-value.gold { color: #946914; } /* darker gold for AA contrast on white (4.9:1); brand --gold kept for fills */
.mrb-rb-value.total { color: var(--mrb-navy); font-size: 15px; }

.mrb-profit-warning {
    background: var(--mrb-warning-bg);
    border: 1px solid rgba(146, 64, 14, .2);
    border-radius: 8px;
    padding: 10px 14px;
    margin-block-start: 12px;
    font-size: 12.5px;
    color: var(--mrb-warning-tx);
    text-align: center;
    display: none;
}
.mrb-profit-warning.show { display: block; }

.mrb-disclaimer {
    background: var(--mrb-bg);
    border: 1px solid var(--mrb-border-soft);
    border-radius: var(--mrb-radius-sm);
    padding: 12px 16px;
    font-size: 12px;
    color: var(--mrb-text-3);
    line-height: 1.7;
}
.mrb-disclaimer strong { color: var(--mrb-text-2); }

/* a11y: visible keyboard focus ring (WCAG 2.4.7) — guards against any global outline reset */
.mrb-section button:focus-visible,
.mrb-section a:focus-visible,
.mrb-section input:focus-visible { outline: 2px solid var(--mrb-teal); outline-offset: 2px; }

/* ── INTERNAL-LINK CTA CARD ── */
.mrb-links-card { background: var(--mrb-surface); border: 1.5px solid var(--mrb-border); border-radius: var(--mrb-radius); overflow: hidden; margin-block-end: 24px; }
.mrb-links-head { background: linear-gradient(135deg, var(--mrb-navy-2), var(--mrb-navy)); color: #fff; padding: 14px 20px; font-size: 14.5px; font-weight: 800; }
.mrb-links-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--mrb-border-soft); }
@media (max-width: 480px) { .mrb-links-grid { grid-template-columns: 1fr; } }
.mrb-link-item { background: var(--mrb-surface); padding: 14px 18px; font-size: 13.5px; font-weight: 700; color: var(--mrb-teal); text-decoration: none; transition: background .15s; display: block; }
.mrb-link-item:hover { background: var(--mrb-teal-bg); }