/* ===================================
   CALORIE CALCULATOR STYLES
   Professional Design for CalcTechLab
   =================================== */

/* Use site's CSS variables - no :root definitions */

/* ===================================
   CALCULATOR CARDS & LAYOUT
   =================================== */
.calculator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.calculator-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* ===================================
   INFO BOXES
   =================================== */
.info-box {
    background: var(--bg-secondary);
    border-left: 4px solid var(--brand-primary);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.info-box h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===================================
   TABS
   =================================== */
.calculator-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 140px;
}

.tab-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--brand-primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

/* ===================================
   TAB CONTENT
   =================================== */
.tab-content {
    margin-top: 1.5rem;
    width: 100%;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

/* Ensure proper display on all screen sizes */
@media (min-width: 768px) {
    .tab-content {
        display: block !important;
    }
    
    .tab-panel {
        width: 100%;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* ===================================
   FORM GRID
   =================================== */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 992px) {
    .calculator-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.input-section,
.results-section {
    padding: 1rem;
}

/* ===================================
   FORM ELEMENTS
   =================================== */
.input-section h2,
.results-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--brand-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

@media (max-width: 576px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-input);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group input[readonly] {
    background: var(--bg-secondary);
    cursor: not-allowed;
}

.unit {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-weight: 500;
}

.form-group {
    position: relative;
}

.form-group input {
    padding-right: 3rem;
}

.method-description,
.field-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    line-height: 1.5;
}

/* ===================================
   CALCULATE BUTTON
   =================================== */
.calculate-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(6, 182, 212, 0.3);
}

.calculate-btn:active {
    transform: translateY(0);
}

/* ===================================
   RESULTS SECTION
   =================================== */
.results-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.result-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.result-card:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
}

.result-card.primary-card {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

.result-card.primary-card h3,
.result-card.primary-card .result-label {
    color: var(--text-inverse);
}

.result-card h3,
.result-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.big-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 1rem 0;
    line-height: 1;
}

.result-card.primary-card .big-number {
    color: var(--text-inverse);
}

.number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.5rem 0;
}

.result-label,
.small-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   MACROS SECTION
   =================================== */
.macros-section {
    margin-top: 2rem;
}

.macros-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.macro-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.macro-tab {
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.macro-tab:hover {
    border-color: var(--brand-primary);
    color: var(--text-primary);
}

.macro-tab.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

.macro-display {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 576px) {
    .macro-display {
        grid-template-columns: 1fr;
    }
}

.macro-item {
    text-align: center;
}

.macro-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.macro-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 0.25rem;
}

.macro-item .calories {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===================================
   ZIGZAG SECTION
   =================================== */
.zigzag-section {
    margin-top: 2rem;
}

.zigzag-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.zigzag-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.zigzag-table th,
.zigzag-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.zigzag-table th {
    background: var(--brand-primary);
    color: var(--text-inverse);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.zigzag-table td {
    color: var(--text-primary);
}

.zigzag-table tr:hover td {
    background: var(--bg-secondary);
}

/* ===================================
   ACTION BUTTONS
   =================================== */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.action-btn {
    flex: 1;
    padding: 1rem;
    background: var(--bg-card);
    border: 2px solid var(--brand-primary);
    border-radius: var(--radius-lg);
    color: var(--brand-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background: var(--brand-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   CONVERTER
   =================================== */
.converter-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 576px) {
    .converter-grid {
        grid-template-columns: 1fr;
    }
}

.converter-input {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.converter-input label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.input-row {
    display: flex;
    gap: 0.5rem;
}

.input-row input,
.input-row select {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-input);
}

.input-row select {
    flex: 0 0 auto;
    min-width: 200px;
}

/* ===================================
   CONVERSION RESULTS
   =================================== */
.conversion-results {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.conversion-results h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.all-conversions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.conversion-item {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
}

.conversion-item h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.conversion-item .value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
}

/* ===================================
   EXERCISE RESULTS
   =================================== */
.exercise-results {
    margin-top: 2rem;
    text-align: center;
}

#met-value {
    font-weight: 700;
    color: var(--brand-primary);
}

/* ===================================
   FOOD DATABASE
   =================================== */
.food-results {
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.food-item {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    transition: all 0.3s ease;
}

.food-item:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
}

.food-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.food-item .calories {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.food-item .serving {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===================================
   MEAL PLANS
   =================================== */
.meal-plan-results {
    margin-top: 1.5rem;
}

.meal-plan {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.meal-plan h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 1rem;
}

.meal-plan .meal {
    margin-bottom: 1rem;
}

.meal-plan .meal h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.meal-plan .meal ul {
    list-style: none;
    padding: 0;
}

.meal-plan .meal li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.meal-plan .meal li:last-child {
    border-bottom: none;
}

/* ===================================
   LOADING SPINNER
   =================================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(6, 182, 212, 0.3);
    border-radius: 50%;
    border-top-color: var(--brand-primary);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    .calculator-card {
        padding: 1.5rem;
    }
    
    .tab-btn {
        min-width: 120px;
        padding: 0.625rem 1rem;
        font-size: 0.9rem;
    }
    
    .big-number {
        font-size: 2.5rem;
    }
    
    .number {
        font-size: 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .calculator-card {
        padding: 1rem;
    }
    
    .input-section h2,
    .results-section h2 {
        font-size: 1.5rem;
    }
    
    .big-number {
        font-size: 2rem;
    }
}
/* ===================================
   ENERGY CONVERTER STYLES
   =================================== */

.converter-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.converter-input {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.converter-input label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.input-row {
    display: flex;
    gap: 0.5rem;
}

.input-row input {
    flex: 1;
}

.input-row select {
    flex: 1;
}

/* ===================================
   MEAL PLAN CARD STYLES
   =================================== */

.meal-plan-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.meal-plan-macros {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.meal-items {
    margin-top: 1rem;
}

.meal-item {
    background: var(--bg-card);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--brand-primary);
}

.meal-item strong {
    color: var(--text-primary);
    font-size: 1rem;
}

.meal-description {
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.meal-macros {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
}

.macro-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

/* ===================================
   EXERCISE RESULTS STYLES
   =================================== */

.exercise-results {
    margin-top: 1.5rem;
}

/* ===================================
   FOOD RESULTS STYLES
   =================================== */

.food-results {
    margin-top: 1.5rem;
}

.food-results table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.food-results th {
    background: var(--brand-primary);
    color: white;
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
}

.food-results td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.food-results tr:hover {
    background: var(--bg-tertiary);
}

.food-results strong {
    color: var(--brand-primary);
}

/* ===================================
   RESPONSIVE DESIGN FOR NEW ELEMENTS
   =================================== */

@media (max-width: 768px) {
    .converter-grid {
        grid-template-columns: 1fr;
    }
    
    .meal-macros {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .food-results {
        font-size: 0.85rem;
    }
    
    .food-results th,
    .food-results td {
        padding: 0.5rem;
    }
}