/* ═══════════════════════════════════════════════════════════════════════════
 * bond-calc.css — Bond Calculator Styles
 * Namespace: bc- (bond calculator)
 * Place at: assets/css/bond-calc.css
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── WRAPPER ─────────────────────────────────────────────────────────────── */
.bc-wrap {
    font-family: inherit;
}

/* ── CALC HEADER ─────────────────────────────────────────────────────────── */
.bc-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--clr-border);
}

.bc-heading {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--clr-text-primary);
    margin: 0 0 4px;
}

.bc-subhead {
    font-size: 0.78rem;
    color: var(--clr-text-muted);
    margin: 0;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-weight: 500;
}

/* ── MODE TABS ───────────────────────────────────────────────────────────── */
.bc-tabs {
    display: flex;
    gap: 4px;
    background: var(--clr-bg-muted);
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 20px;
}

.bc-tab {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--clr-text-secondary);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
    white-space: nowrap;
    text-align: center;
}

.bc-tab:hover {
    color: var(--clr-accent-dark);
    background: var(--clr-accent-hover);
}

.bc-tab--active {
    background: var(--clr-bg);
    color: var(--clr-accent-dark);
    box-shadow: 0 1px 4px rgba(0,0,0,0.10);
}

/* ── INPUT ROWS ──────────────────────────────────────────────────────────── */
.bc-inputs {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 18px;
}

.bc-row {
    display: grid;
    gap: 12px;
}

.bc-row--3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 680px) {
    .bc-row--3 {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 420px) {
    .bc-row--3 {
        grid-template-columns: 1fr;
    }
}

/* ── FIELD ───────────────────────────────────────────────────────────────── */
.bc-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bc-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--clr-text-primary);
    line-height: 1.3;
}

.bc-hint {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--clr-text-muted);
    background: var(--clr-bg-muted);
    padding: 1px 5px;
    border-radius: 4px;
    border: 1px solid var(--clr-border);
    white-space: nowrap;
}

.bc-input-wrap {
    display: flex;
    align-items: center;
    border: 1.5px solid var(--clr-border);
    border-radius: 7px;
    background: var(--clr-bg);
    overflow: hidden;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.bc-input-wrap:focus-within {
    border-color: var(--clr-accent);
    box-shadow: var(--shadow-focus);
}

.bc-prefix,
.bc-suffix {
    padding: 0 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    background: var(--clr-bg-muted);
    border-right: 1px solid var(--clr-border);
    height: 100%;
    display: flex;
    align-items: center;
    white-space: nowrap;
    align-self: stretch;
}

.bc-suffix {
    border-right: none;
    border-left: 1px solid var(--clr-border);
}

.bc-input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    padding: 7px 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--clr-text-primary);
    background: transparent;
    -moz-appearance: textfield;
}

.bc-input::-webkit-outer-spin-button,
.bc-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.bc-select {
    padding: 7px 8px;
    font-size: 0.83rem;
    font-weight: 500;
    color: var(--clr-text-primary);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 26px;
}

.bc-input-wrap--select {
    /* no prefix/suffix borders needed for pure select */
}

.bc-desc {
    font-size: 0.7rem;
    color: var(--clr-text-muted);
    line-height: 1.35;
}

/* ── ACTION BUTTONS ──────────────────────────────────────────────────────── */
.bc-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 20px;
}

.bc-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px;
    border-radius: 8px;
    font-size: 0.87rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.1s ease;
    line-height: 1;
    white-space: nowrap;
}

.bc-btn:active {
    transform: translateY(1px);
}

.bc-btn--primary {
    background: var(--clr-accent);
    color: #fff;
    border-color: var(--clr-accent);
    box-shadow: 0 2px 8px rgba(14,165,233,0.25);
}

.bc-btn--primary:hover {
    background: var(--clr-accent-dark);
    border-color: var(--clr-accent-dark);
    box-shadow: 0 4px 14px rgba(14,165,233,0.30);
}

.bc-btn--ghost {
    background: var(--clr-bg-muted);
    color: var(--clr-text-secondary);
    border-color: var(--clr-border);
}

.bc-btn--ghost:hover {
    background: var(--clr-accent-light);
    color: var(--clr-accent-dark);
    border-color: var(--clr-accent-hover);
}

/* ── PRIMARY RESULT HIGHLIGHT ────────────────────────────────────────────── */
.bc-result-primary {
    background: linear-gradient(135deg, var(--clr-accent-dark) 0%, #0284c7 100%);
    border-radius: 10px;
    padding: 18px 22px;
    margin-bottom: 16px;
    color: #fff;
}

.bc-result-primary-inner {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.bc-result-primary-label {
    font-size: 0.75rem;
    font-weight: 600;
    opacity: 0.85;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.bc-result-primary-value {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.bc-result-primary-sub {
    font-size: 0.78rem;
    opacity: 0.75;
    margin-top: 2px;
}

/* ── RESULT GRID ─────────────────────────────────────────────────────────── */
.bc-result-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

@media (max-width: 760px) {
    .bc-result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 380px) {
    .bc-result-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.bc-result-card {
    background: var(--clr-bg-soft);
    border: 1px solid var(--clr-border);
    border-radius: 8px;
    padding: 11px 12px;
    display: flex;
    flex-direction: column;
    gap: 3px;
    transition: box-shadow 0.15s ease;
}

.bc-result-card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}

.bc-result-label {
    font-size: 0.69rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.3;
}

.bc-result-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-text-primary);
    line-height: 1.2;
    word-break: break-all;
}

.bc-result-note {
    font-size: 0.67rem;
    color: var(--clr-text-muted);
    line-height: 1.3;
}

/* Bond status badge colouring */
#bc-status.bc-status--discount { color: #0ea5e9; }
#bc-status.bc-status--par      { color: #22c55e; }
#bc-status.bc-status--premium  { color: #f59e0b; }

/* ── BREAKDOWN BAR ───────────────────────────────────────────────────────── */
.bc-breakdown {
    background: var(--clr-bg-soft);
    border: 1px solid var(--clr-border);
    border-radius: 8px;
    padding: 14px 16px;
}

.bc-breakdown-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--clr-text-secondary);
    margin: 0 0 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.bc-breakdown-bar {
    height: 10px;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    background: var(--clr-bg-muted);
    margin-bottom: 10px;
}

.bc-bar-principal {
    background: var(--clr-accent);
    height: 100%;
    transition: width 0.4s ease;
}

.bc-bar-coupon {
    background: var(--clr-interest);
    height: 100%;
    transition: width 0.4s ease;
}

.bc-breakdown-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.bc-legend-item {
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--clr-text-secondary);
}

.bc-legend-item::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
}

.bc-legend-principal::before { background: var(--clr-accent); }
.bc-legend-coupon::before    { background: var(--clr-interest); }

/* ── ERROR STATE ─────────────────────────────────────────────────────────── */
.bc-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 0.82rem;
    color: #b91c1c;
    font-weight: 500;
    margin-top: 12px;
    display: none;
}

.bc-error--visible {
    display: block;
}

/* ── INPUT ERROR HIGHLIGHT ───────────────────────────────────────────────── */
.bc-input-wrap--error {
    border-color: #f87171;
    box-shadow: 0 0 0 3px rgba(248,113,113,0.15);
}

/* ── RESULTS ANIMATION ───────────────────────────────────────────────────── */
#bc-results:not([hidden]) {
    animation: bc-fade-in 0.25s ease forwards;
}

@keyframes bc-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE TWEAKS ───────────────────────────────────────────────────── */
@media (max-width: 520px) {
    .bc-result-primary-value {
        font-size: 1.6rem;
    }
    .bc-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .bc-btn {
        justify-content: center;
    }
    .bc-tabs {
        flex-direction: column;
    }
}