/* Calculators page — redesigned layout */
:root {
    --earth: #8a7a6a;
    --earth-dark: #5c4e40;
    --earth-light: #a09080;
    --earth-subtle: rgba(138, 122, 106, 0.07);
}

/* ─── Page layout ───────────────────────────────────────────── */
.calc-layout {
    display: flex;
    flex: 1;
    min-height: calc(100vh - 52px - 52px);
}

/* ─── Sidebar ───────────────────────────────────────────────── */
.calc-sidebar {
    flex: 0 0 188px;
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    position: sticky;
    top: 0;
    height: calc(100vh - 52px);
}

.calc-sidebar-inner {
    padding: 14px 8px 40px;
}

.calc-sidebar-label {
    font-size: 0.625rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--earth-dark);
    margin: 18px 0 4px;
    padding: 0 8px;
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 700;
}

.calc-sidebar-label:first-child { margin-top: 4px; }

.calc-nav-link {
    display: block;
    padding: 6px 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 5px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.3;
    transition: color 0.12s, background 0.12s;
}

.calc-nav-link:hover {
    color: var(--text);
    background: rgba(255,255,255,0.05);
}

.calc-nav-link.active {
    color: var(--text);
    background: rgba(255,255,255,0.09);
    font-weight: 500;
}

/* ─── Main area ─────────────────────────────────────────────── */
.calc-main {
    flex: 1;
    overflow-y: auto;
    padding: 0 0 80px;
    min-width: 0;
}

/* ─── Panel ─────────────────────────────────────────────────── */
.calc-panel {
    display: none;
    padding: 28px 32px;
    max-width: 960px;
}

.calc-panel.active { display: block; }

.calc-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 6px;
    letter-spacing: -0.02em;
    color: var(--text);
}

.calc-desc {
    color: var(--text-secondary);
    margin: 0 0 24px;
    font-size: 0.875rem;
    line-height: 1.55;
    max-width: 600px;
}

/* ─── Two-column layout: form | results ─────────────────────── */
.calc-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 20px;
    align-items: start;
}

/* ─── Input card ─────────────────────────────────────────────── */
.calc-inputs {
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 16px 16px;
}

/* Stacked 2-column input grid */
.calc-inputs .input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 14px;
    margin-bottom: 14px;
}

.calc-inputs .input-grid.single-col {
    grid-template-columns: 1fr;
}

/* Each field block: label on top, input below */
.calc-inputs .form-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Span full width when needed */
.calc-inputs .form-row.span-2 {
    grid-column: 1 / -1;
}

.calc-inputs label {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    letter-spacing: 0.01em;
    line-height: 1.2;
}

.calc-inputs input[type="number"],
.calc-inputs input[type="text"],
.calc-inputs select {
    width: 100%;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: border-color 0.15s, background 0.15s;
    box-sizing: border-box;
    /* Prevent overflow */
    min-width: 0;
    text-overflow: ellipsis;
}

.calc-inputs input[type="number"]:focus,
.calc-inputs input[type="text"]:focus,
.calc-inputs select:focus {
    border-color: var(--earth);
    background: rgba(255,255,255,0.04);
}

/* ─── Calculate button ───────────────────────────────────────── */
.calc-btn {
    width: 100%;
    padding: 10px 14px;
    margin-top: 4px;
    background: var(--earth);
    color: #fff;
    border: none;
    border-radius: 7px;
    font-size: 0.875rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
    letter-spacing: 0.01em;
}

.calc-btn:hover { opacity: 0.85; }

.calc-btn-secondary {
    width: 100%;
    padding: 7px 10px;
    margin-top: 6px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.775rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    cursor: pointer;
    transition: color 0.12s, border-color 0.12s;
}

.calc-btn-secondary:hover {
    color: var(--text);
    border-color: rgba(255,255,255,0.2);
}

/* ─── Results panel ──────────────────────────────────────────── */
.calc-results {
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 18px;
    min-height: 120px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

.calc-results:empty::before {
    content: 'Results will appear here.';
    color: var(--text-secondary);
    font-size: 0.8125rem;
    opacity: 0.6;
}

/* Primary hero result at top */
.result-hero {
    padding: 14px 0 16px;
    margin-bottom: 14px;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.result-hero-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 600;
}

.result-hero-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.03em;
    line-height: 1;
}

.result-hero-unit {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 4px;
}

/* Individual result rows */
.result-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 5px 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    gap: 12px;
}

.result-row:last-child { border-bottom: none; }

.result-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    flex: 1;
    line-height: 1.3;
}

.result-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    text-align: right;
    white-space: nowrap;
}

.result-value.result-primary {
    font-size: 1rem;
    color: var(--earth-light);
}

.result-value.result-warn  { color: #f59e0b; }
.result-value.result-ok    { color: #6ee7b7; }
.result-value.result-bad   { color: #f87171; }

.result-section {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.result-section-title {
    font-size: 0.65rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 0 0 8px;
    font-weight: 700;
}

.result-note {
    font-size: 0.775rem;
    color: var(--text-secondary);
    line-height: 1.5;
    padding: 8px 10px;
    background: rgba(255,255,255,0.03);
    border-radius: 5px;
    margin-top: 8px;
}

.result-note.warn {
    background: rgba(245,158,11,0.08);
    border-left: 3px solid #f59e0b;
    color: #f59e0b;
}

.result-note.ok {
    background: rgba(110,231,183,0.07);
    border-left: 3px solid #6ee7b7;
    color: #6ee7b7;
}

/* ─── Notes bar ──────────────────────────────────────────────── */
.calc-notes {
    margin-top: 14px;
    padding: 10px 14px;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
    border-radius: 7px;
    font-size: 0.775rem;
    color: var(--text-secondary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.55;
}

.calc-notes strong { color: var(--text); }

/* ─── Tabs ───────────────────────────────────────────────────── */
.calc-tabs {
    display: flex;
    gap: 3px;
    margin-bottom: 14px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 3px;
}

.calc-tab {
    flex: 1;
    padding: 6px 8px;
    font-size: 0.775rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: transparent;
    border: none;
    border-radius: 5px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.calc-tab.active {
    background: rgba(255,255,255,0.1);
    color: var(--text);
    font-weight: 500;
}

/* ─── Reference tables ───────────────────────────────────────── */
.calc-table-wrap {
    overflow-x: auto;
    margin-top: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.calc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

.calc-table th {
    text-align: left;
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.675rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    white-space: nowrap;
    background: rgba(255,255,255,0.02);
}

.calc-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: var(--text);
    vertical-align: top;
}

.calc-table tbody tr:last-child td { border-bottom: none; }
.calc-table tr:hover td { background: rgba(255,255,255,0.025); }

.table-section-header {
    background: rgba(255,255,255,0.04) !important;
    color: var(--text-secondary) !important;
    font-size: 0.675rem !important;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    font-weight: 600;
}

.calc-filter-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.calc-filter-row select {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    color: var(--text);
    font-size: 0.8125rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ─── Crew day rows ──────────────────────────────────────────── */
.crew-row {
    display: grid;
    grid-template-columns: 1fr 52px 72px 20px;
    gap: 5px;
    margin-bottom: 5px;
    align-items: center;
}

.crew-row input {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 6px 8px;
    color: var(--text);
    font-size: 0.8125rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    width: 100%;
    box-sizing: border-box;
}

.crew-row input:focus {
    outline: none;
    border-color: var(--earth);
}

.crew-remove {
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    text-align: center;
    transition: color 0.12s;
}

.crew-remove:hover { color: #f87171; }

.form-section-label {
    font-size: 0.625rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--earth-dark);
    margin: 12px 0 6px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-weight: 700;
}

/* Mobile calculator navigator (shown only on mobile) */
.calc-mobile-nav {
    display: none;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.calc-mobile-select {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8278' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
    .calc-inputs .input-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .calc-sidebar { display: none; }
    .calc-mobile-nav { display: block; }
    .calc-panel { padding: 14px 16px; }
    .calc-title { font-size: 1.125rem; }
}

@media (max-width: 480px) {
    .calc-inputs .input-grid { grid-template-columns: 1fr; }
    .calc-inputs .form-row.span-2 { grid-column: 1; }
    .calc-panel { padding: 12px; }
    .calc-grid { gap: 12px; }
}