/**
 * Baby Formula Calculator CSS
 * Tool: formula-calculator
 * Category: pregnancy
 */

/* ===========================
   Two-column layout (tool-layout-split)
   =========================== */
.formula-layout {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.formula-input-column {
    flex: 0 0 360px;
    min-width: 0;
}

.formula-result-column {
    flex: 1;
    min-width: 0;
    position: sticky;
    top: 24px;
}

/* ===========================
   Input section
   =========================== */
.formula-input-section {
    background: #faf9f7;
    border: 1px solid #e8e4dc;
    border-radius: 12px;
    padding: 24px;
}

.formula-input-section h2 {
    margin: 0 0 20px 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d2a26;
    display: flex;
    align-items: center;
    gap: 8px;
}

.formula-input-section h2 i {
    color: #d4af37;
}

.formula-input-group {
    margin-bottom: 20px;
}

.formula-input-group:last-child {
    margin-bottom: 0;
}

.formula-input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2d2a26;
    font-size: 0.95rem;
}

.formula-input-group input[type="number"],
.formula-input-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e8e4dc;
    border-radius: 8px;
    font-size: 1rem;
    background: #fff;
    color: #2d2a26;
    box-sizing: border-box;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.formula-input-group input:focus,
.formula-input-group select:focus {
    outline: none;
    border-color: #d4af37;
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.formula-input-hint {
    margin-top: 6px;
    font-size: 0.85rem;
    color: #5f5a56;
}

/* Weight input row */
.formula-weight-row {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.formula-weight-row .formula-input-group {
    flex: 1;
    margin-bottom: 0;
}

.formula-weight-unit {
    flex-shrink: 0;
    padding: 12px 0;
    font-size: 0.95rem;
    color: #5f5a56;
    font-weight: 500;
}

/* ===========================
   Main result card
   =========================== */
.formula-main-result {
    background: linear-gradient(135deg, #2d2a26 0%, #3d3a36 100%);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    color: #fff;
    margin-bottom: 20px;
}

.formula-result-title {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
}

.formula-primary-result {
    margin-bottom: 20px;
}

.formula-primary-value {
    font-size: 4rem;
    font-weight: 700;
    color: #d4af37;
    line-height: 1;
}

.formula-primary-unit {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-left: 8px;
}

.formula-primary-label {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 8px;
}

.formula-sub-results {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.formula-sub-item {
    text-align: center;
}

.formula-sub-value {
    font-size: 1.8rem;
    font-weight: 600;
    color: #fff;
}

.formula-sub-unit {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-left: 4px;
}

.formula-sub-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

/* ===========================
   Feeding guide card
   =========================== */
.formula-guide-card {
    background: #fff;
    border: 1px solid #e8e4dc;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.formula-guide-card h3 {
    margin: 0 0 16px 0;
    font-size: 1rem;
    font-weight: 600;
    color: #2d2a26;
    display: flex;
    align-items: center;
    gap: 8px;
}

.formula-guide-card h3 i {
    color: #d4af37;
}

.formula-guide-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.formula-guide-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #faf9f7;
    border-radius: 8px;
}

.formula-guide-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #d4af37 0%, #c9a432 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
}

.formula-guide-content {
    flex: 1;
}

.formula-guide-title {
    font-weight: 500;
    color: #2d2a26;
    font-size: 0.95rem;
}

.formula-guide-desc {
    font-size: 0.85rem;
    color: #5f5a56;
    margin-top: 2px;
}

/* ===========================
   Reference table by age
   =========================== */
.formula-reference-card {
    background: #fff;
    border: 1px solid #e8e4dc;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.formula-reference-card h3 {
    margin: 0 0 16px 0;
    font-size: 1rem;
    font-weight: 600;
    color: #2d2a26;
    display: flex;
    align-items: center;
    gap: 8px;
}

.formula-reference-card h3 i {
    color: #d4af37;
}

.formula-reference-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.formula-reference-table th,
.formula-reference-table td {
    padding: 10px 12px;
    text-align: center;
    border-bottom: 1px solid #e8e4dc;
}

.formula-reference-table th {
    background: #faf9f7;
    font-weight: 600;
    color: #2d2a26;
}

.formula-reference-table td {
    color: #5f5a56;
}

.formula-reference-table tr:last-child td {
    border-bottom: none;
}

.formula-reference-table tr.active {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.1) 0%, rgba(212, 175, 55, 0.05) 100%);
}

.formula-reference-table tr.active td {
    color: #2d2a26;
    font-weight: 500;
}

/* ===========================
   Notice card
   =========================== */
.formula-notice-card {
    background: #fff;
    border: 1px solid #e8e4dc;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.formula-notice-card h3 {
    margin: 0 0 16px 0;
    font-size: 1rem;
    font-weight: 600;
    color: #2d2a26;
    display: flex;
    align-items: center;
    gap: 8px;
}

.formula-notice-card h3 i {
    color: #d4af37;
}

.formula-notice-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.formula-notice-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
    color: #5f5a56;
    line-height: 1.5;
}

.formula-notice-item i {
    flex-shrink: 0;
    color: #d4af37;
    margin-top: 2px;
}

/* ===========================
   Default state (before input)
   =========================== */
.formula-default-state {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border: 1px solid #e8e4dc;
    border-radius: 12px;
}

.formula-default-icon {
    font-size: 4rem;
    color: #e8e4dc;
    margin-bottom: 16px;
}

.formula-default-text {
    font-size: 1rem;
    color: #5f5a56;
    line-height: 1.6;
}

/* ===========================
   Results wrapper
   =========================== */
.formula-results-wrapper {
    display: none;
}

.formula-results-wrapper.active {
    display: block;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 900px) {
    .formula-layout {
        flex-direction: column;
    }

    .formula-input-column {
        flex: none;
        width: 100%;
    }

    .formula-result-column {
        position: static;
    }
}

@media (max-width: 600px) {
    .formula-input-section {
        padding: 20px 16px;
    }

    .formula-main-result {
        padding: 24px 16px;
    }

    .formula-primary-value {
        font-size: 3rem;
    }

    .formula-primary-unit {
        font-size: 1.2rem;
    }

    .formula-sub-results {
        flex-direction: column;
        gap: 16px;
    }

    .formula-weight-row {
        flex-direction: column;
        align-items: stretch;
    }

    .formula-weight-unit {
        text-align: right;
    }

    .formula-reference-table {
        font-size: 0.8rem;
    }

    .formula-reference-table th,
    .formula-reference-table td {
        padding: 8px 6px;
    }
}