/* BuildMetrics — Shared Calc Page Styles (calcs/*.html) */

/* ── Layout ── */
.calc-page-wrap {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bg-page);
}

.calc-main {
    display: flex;
    flex: 1;
    gap: 0;
    max-width: 100%;
    overflow: hidden;
}

/* ── Input Panel ── */
#calc-input-panel {
    width: 360px;
    min-width: 320px;
    max-width: 400px;
    flex-shrink: 0;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    padding-bottom: 40px;
}

/* ── Results Panel ── */
#calc-results-panel {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ── Badges grid ── */
.calc-badges {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.calc-badge {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.calc-badge-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
}

.calc-badge-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    line-height: 1.1;
}

.calc-badge-unit {
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ── Results table card ── */
.calc-results-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.calc-results-card .card-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-subtle);
}

.calc-results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.83rem;
}

.calc-results-table th {
    padding: 10px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
    background: var(--bg-subtle);
}

.calc-results-table td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.calc-results-table tr:last-child td { border-bottom: none; }
.calc-results-table tr:hover td { background: var(--bg-subtle); }

.calc-results-table td.mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 600;
}

/* Pass/Fail badges */
.bm-pass, .bm-fail {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 99px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.bm-pass { background: #DCFCE7; color: #15803D; }
.bm-fail { background: #FEE2E2; color: #DC2626; }

/* ── Input section (mirrors index.html) ── */
.calc-input-header {
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    background: #fff;
    position: relative;
}
.calc-input-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563EB, #7C3AED);
    border-radius: 0;
}

.calc-input-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.input-section {
    border-bottom: 1px solid var(--border);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 20px;
    cursor: pointer;
    font-size: 0.81rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: background 0.15s;
    user-select: none;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.section-header:hover { background: var(--bg-subtle); }

.section-body {
    padding: 14px 20px 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: #fff;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-row label {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
}

.form-row input, .form-row select {
    padding: 9px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
    width: 100%;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

.form-row input:focus, .form-row select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.form-row .unit-tag {
    font-size: 0.73rem;
    color: var(--text-muted);
    margin-top: 2px;
    font-weight: 500;
}

.form-row-inline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

/* ── Calculate button area ── */
.calc-action-bar {
    padding: 16px 20px;
    border-top: 2px solid var(--border);
    background: #fff;
    display: flex;
    gap: 8px;
    position: sticky;
    bottom: 0;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
}

/* ── Action bar buttons — self-contained (no .btn base required) ── */
.calc-action-bar button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border-radius: 9px;
    transition: all 0.15s;
    line-height: 1;
    white-space: nowrap;
}

.calc-action-bar .btn-primary {
    background: #2563EB;
    color: #fff;
    border: 1.5px solid #2563EB;
    flex: 1;
    font-size: 0.9rem;
    padding: 11px 16px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}
.calc-action-bar .btn-primary:hover {
    background: #1D4ED8;
    border-color: #1D4ED8;
    box-shadow: 0 4px 14px rgba(37,99,235,0.4);
    transform: translateY(-1px);
}
.calc-action-bar .btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.calc-action-bar .btn-secondary {
    background: #fff;
    color: #16A34A;
    border: 1.5px solid #16A34A;
    padding: 11px 14px;
}
.calc-action-bar .btn-secondary:hover {
    background: #F0FDF4;
    border-color: #15803D;
    color: #15803D;
}

.calc-action-bar .btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1.5px solid var(--border);
    padding: 10px 12px;
    font-size: 1rem;
}
.calc-action-bar .btn-ghost:hover {
    background: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--border-strong, #94A3B8);
}

/* ── Diagram SVG area ── */
.calc-diagram-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.calc-diagram-card .card-header {
    padding: 12px 18px;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-subtle);
}

.calc-diagram-body {
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 120px;
}

/* ── Welcome / empty state ── */
.calc-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 40px;
    gap: 16px;
    color: var(--text-muted);
}

.calc-welcome-icon {
    font-size: 3rem;
    line-height: 1;
}

.calc-welcome h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0;
}

.calc-welcome p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    max-width: 280px;
    line-height: 1.5;
}

/* ── Utilisation gauge ── */
.util-gauge-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
}

.util-gauge-svg { flex-shrink: 0; }

.util-gauge-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.util-gauge-value {
    font-size: 1.6rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    line-height: 1;
}

.util-gauge-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ── Save Modal ── */
.calc-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.calc-modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.calc-modal-box {
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 28px;
    width: 360px;
    max-width: 90vw;
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: bm-pop 0.2s ease;
}

.calc-modal-box h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .calc-main { flex-direction: column; }
    #calc-input-panel { width: 100%; max-width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
}