/* =========================================
   CALORIE CALCULATOR CSS
   ========================================= */

:root {
    --cal-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --cal-gradient-2: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --cal-gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --cal-gradient-4: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --cal-bg-dark: #0f172a;
    --cal-bg-card: #1e293b;
    --cal-bg-input: #0f172a;
    --cal-border: #334155;
    --cal-border-light: #475569;
    --cal-white: #ffffff;
    --cal-gray: #cbd5e1;
    --cal-muted: #94a3b8;
    --cal-success: #22c55e;
    --cal-warning: #eab308;
    --cal-danger: #ef4444;
    --cal-purple: #a855f7;
    --cal-blue: #3b82f6;
    --cal-orange: #f97316;
    --cal-pink: #ec4899;
    --cal-cyan: #06b6d4;
}

.calorie-calc-wrapper {
    background: linear-gradient(to bottom, var(--cal-bg-dark), var(--cal-bg-card));
    padding: 3rem 1.5rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--cal-white);
    line-height: 1.6;
    min-height: 100vh;
}

.calorie-calc-wrapper * {
    box-sizing: border-box;
}

.calorie-calc-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.calorie-calc-wrapper .calc-header {
    text-align: center;
    margin-bottom: 3rem;
}

.calorie-calc-wrapper .calc-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--cal-white);
    margin-bottom: 1rem;
}

.calorie-calc-wrapper .calc-description {
    font-size: 1.1rem;
    color: var(--cal-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* Main Calculator Card */
.calorie-calc-wrapper .calculator-main-card {
    background: var(--cal-bg-card);
    border: 1px solid var(--cal-border);
    border-radius: 1.5rem;
    overflow: hidden;
    margin-bottom: 2rem;
}

/* Tabs */
.calorie-calc-wrapper .calc-tabs {
    display: flex;
    border-bottom: 1px solid var(--cal-border);
    background: var(--cal-bg-input);
}

.calorie-calc-wrapper .tab-btn {
    flex: 1;
    padding: 1.25rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--cal-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.calorie-calc-wrapper .tab-btn:hover {
    color: var(--cal-white);
    background: rgba(255,255,255,0.03);
}

.calorie-calc-wrapper .tab-btn.active {
    color: var(--cal-white);
    background: var(--cal-bg-card);
}

.calorie-calc-wrapper .tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--cal-gradient);
}

/* Form */
.calorie-calc-wrapper .calc-form {
    padding: 2rem;
}

.calorie-calc-wrapper .form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.calorie-calc-wrapper .form-group {
    display: flex;
    flex-direction: column;
}

.calorie-calc-wrapper .form-group.full-width {
    grid-column: 1 / -1;
}

.calorie-calc-wrapper .form-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cal-white);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calorie-calc-wrapper .form-label i {
    color: var(--cal-purple);
}

.calorie-calc-wrapper .form-input,
.calorie-calc-wrapper .form-select {
    padding: 0.875rem 1.25rem;
    border: 1px solid var(--cal-border-light);
    border-radius: 0.75rem;
    background: var(--cal-bg-input);
    color: var(--cal-white);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.calorie-calc-wrapper .form-input:focus,
.calorie-calc-wrapper .form-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}

.calorie-calc-wrapper .form-input::placeholder {
    color: var(--cal-muted);
}

.calorie-calc-wrapper .input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.calorie-calc-wrapper .input-unit {
    position: absolute;
    right: 1.25rem;
    color: var(--cal-muted);
    font-size: 0.9rem;
    font-weight: 600;
    pointer-events: none;
}

.calorie-calc-wrapper .input-with-unit .form-input {
    padding-right: 3.5rem;
    width: 100%;
}

/* Gender Buttons */
.calorie-calc-wrapper .gender-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.calorie-calc-wrapper .gender-option {
    cursor: pointer;
}

.calorie-calc-wrapper .gender-option input {
    display: none;
}

.calorie-calc-wrapper .gender-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border: 2px solid var(--cal-border-light);
    border-radius: 0.75rem;
    background: var(--cal-bg-input);
    color: var(--cal-gray);
    font-weight: 600;
    transition: all 0.3s ease;
}

.calorie-calc-wrapper .gender-option input:checked + .gender-btn {
    border-color: #667eea;
    background: rgba(102,126,234,0.1);
    color: var(--cal-white);
}

.calorie-calc-wrapper .gender-btn:hover {
    border-color: var(--cal-purple);
}

/* Height Imperial */
.calorie-calc-wrapper .height-imperial {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Calculate Button */
.calorie-calc-wrapper .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.calorie-calc-wrapper .btn-primary {
    background: var(--cal-gradient);
    color: var(--cal-white);
}

.calorie-calc-wrapper .btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(102,126,234,0.4);
}

/* Results Section */
.calorie-calc-wrapper .results-section {
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.calorie-calc-wrapper .section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cal-white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calorie-calc-wrapper .section-title i {
    color: var(--cal-purple);
}

/* Results Grid */
.calorie-calc-wrapper .results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.calorie-calc-wrapper .result-card {
    background: var(--cal-bg-card);
    border: 1px solid var(--cal-border);
    border-radius: 1.25rem;
    padding: 1.75rem;
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    transition: all 0.3s ease;
}

.calorie-calc-wrapper .result-card:hover {
    border-color: var(--cal-purple);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

.calorie-calc-wrapper .result-card.featured {
    border-color: var(--cal-purple);
    background: linear-gradient(135deg, rgba(102,126,234,0.1) 0%, rgba(118,75,162,0.1) 100%);
}

.calorie-calc-wrapper .result-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--cal-white);
}

.calorie-calc-wrapper .result-icon.bmr {
    background: var(--cal-gradient-2);
}

.calorie-calc-wrapper .result-icon.tdee {
    background: var(--cal-gradient-4);
}

.calorie-calc-wrapper .result-icon.goal {
    background: var(--cal-gradient);
}

.calorie-calc-wrapper .result-content {
    flex: 1;
}

.calorie-calc-wrapper .result-label {
    font-size: 0.85rem;
    color: var(--cal-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.calorie-calc-wrapper .result-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--cal-white);
    margin-bottom: 0.25rem;
}

.calorie-calc-wrapper .result-description {
    font-size: 0.85rem;
    color: var(--cal-muted);
}

/* Macros Section */
.calorie-calc-wrapper .macros-section {
    background: var(--cal-bg-card);
    border: 1px solid var(--cal-border);
    border-radius: 1.25rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.calorie-calc-wrapper .macros-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cal-white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calorie-calc-wrapper .macros-title i {
    color: var(--cal-orange);
}

.calorie-calc-wrapper .macros-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.calorie-calc-wrapper .macro-card {
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.calorie-calc-wrapper .macro-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.calorie-calc-wrapper .macro-card.protein {
    border-top: 3px solid var(--cal-success);
}

.calorie-calc-wrapper .macro-card.carbs {
    border-top: 3px solid var(--cal-blue);
}

.calorie-calc-wrapper .macro-card.fats {
    border-top: 3px solid var(--cal-warning);
}

.calorie-calc-wrapper .macro-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    background: var(--cal-gradient);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--cal-white);
}

.calorie-calc-wrapper .macro-card.protein .macro-icon {
    background: linear-gradient(135deg, var(--cal-success) 0%, #16a34a 100%);
}

.calorie-calc-wrapper .macro-card.carbs .macro-icon {
    background: linear-gradient(135deg, var(--cal-blue) 0%, #1d4ed8 100%);
}

.calorie-calc-wrapper .macro-card.fats .macro-icon {
    background: linear-gradient(135deg, var(--cal-warning) 0%, #ca8a04 100%);
}

.calorie-calc-wrapper .macro-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cal-gray);
    margin-bottom: 0.75rem;
}

.calorie-calc-wrapper .macro-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--cal-white);
    margin-bottom: 0.25rem;
}

.calorie-calc-wrapper .macro-percentage {
    font-size: 0.9rem;
    color: var(--cal-muted);
    margin-bottom: 0.25rem;
}

.calorie-calc-wrapper .macro-calories {
    font-size: 0.85rem;
    color: var(--cal-muted);
}

/* Projection Section */
.calorie-calc-wrapper .projection-section {
    background: var(--cal-bg-card);
    border: 1px solid var(--cal-border);
    border-radius: 1.25rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.calorie-calc-wrapper .projection-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cal-white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calorie-calc-wrapper .projection-title i {
    color: var(--cal-cyan);
}

.calorie-calc-wrapper .projection-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.calorie-calc-wrapper .projection-item {
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
}

.calorie-calc-wrapper .projection-period {
    font-size: 0.85rem;
    color: var(--cal-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.calorie-calc-wrapper .projection-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cal-white);
}

.calorie-calc-wrapper .projection-value.positive {
    color: var(--cal-success);
}

.calorie-calc-wrapper .projection-value.negative {
    color: var(--cal-danger);
}

/* Info Cards */
.calorie-calc-wrapper .info-card {
    background: var(--cal-bg-card);
    border: 1px solid var(--cal-border);
    border-radius: 1.5rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.calorie-calc-wrapper .info-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cal-white);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calorie-calc-wrapper .info-title i {
    color: var(--cal-purple);
}

/* Formulas Grid */
.calorie-calc-wrapper .formulas-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.calorie-calc-wrapper .formula-box {
    padding: 1.5rem;
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 1rem;
}

.calorie-calc-wrapper .formula-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cal-white);
    margin-bottom: 0.75rem;
}

.calorie-calc-wrapper .formula {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--cal-cyan);
    background: var(--cal-bg-card);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.calorie-calc-wrapper .formula-box p {
    font-size: 0.85rem;
    color: var(--cal-muted);
    line-height: 1.5;
}

/* Activity Guide */
.calorie-calc-wrapper .activity-guide {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.calorie-calc-wrapper .activity-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 1.5rem;
    padding: 1.25rem;
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 0.75rem;
}

.calorie-calc-wrapper .activity-level {
    font-weight: 700;
    color: var(--cal-white);
    font-size: 0.95rem;
}

.calorie-calc-wrapper .activity-description {
    color: var(--cal-gray);
    font-size: 0.9rem;
    line-height: 1.6;
}

.calorie-calc-wrapper .activity-description strong {
    color: var(--cal-white);
    display: block;
    margin-bottom: 0.25rem;
}

/* Tips Grid */
.calorie-calc-wrapper .tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.calorie-calc-wrapper .tip-box {
    padding: 1.5rem;
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 1rem;
}

.calorie-calc-wrapper .tip-icon {
    width: 48px;
    height: 48px;
    background: var(--cal-gradient);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--cal-white);
    margin-bottom: 1rem;
}

.calorie-calc-wrapper .tip-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cal-white);
    margin-bottom: 0.5rem;
}

.calorie-calc-wrapper .tip-box p {
    font-size: 0.85rem;
    color: var(--cal-muted);
    line-height: 1.6;
}

/* Macro Info Grid */
.calorie-calc-wrapper .macro-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.calorie-calc-wrapper .macro-info-card {
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border);
    border-radius: 1rem;
    overflow: hidden;
}

.calorie-calc-wrapper .macro-info-header {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.calorie-calc-wrapper .macro-info-header.protein {
    background: linear-gradient(135deg, var(--cal-success) 0%, #16a34a 100%);
}

.calorie-calc-wrapper .macro-info-header.carbs {
    background: linear-gradient(135deg, var(--cal-blue) 0%, #1d4ed8 100%);
}

.calorie-calc-wrapper .macro-info-header.fats {
    background: linear-gradient(135deg, var(--cal-warning) 0%, #ca8a04 100%);
}

.calorie-calc-wrapper .macro-info-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--cal-white);
}

.calorie-calc-wrapper .macro-info-content {
    padding: 1.5rem;
}

.calorie-calc-wrapper .macro-cal {
    font-weight: 700;
    color: var(--cal-white);
    margin-bottom: 1rem;
    padding: 0.5rem 1rem;
    background: var(--cal-bg-card);
    border-radius: 0.5rem;
    display: inline-block;
}

.calorie-calc-wrapper .macro-info-content p {
    font-size: 0.85rem;
    color: var(--cal-gray);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.calorie-calc-wrapper .macro-info-content p:last-child {
    margin-bottom: 0;
}

.calorie-calc-wrapper .macro-info-content strong {
    color: var(--cal-white);
}

/* FAQ */
.calorie-calc-wrapper .faq-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.calorie-calc-wrapper .faq-item {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--cal-border);
}

.calorie-calc-wrapper .faq-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.calorie-calc-wrapper .faq-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cal-white);
    margin-bottom: 0.5rem;
}

.calorie-calc-wrapper .faq-item p {
    font-size: 0.95rem;
    color: var(--cal-muted);
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 1024px) {
    .calorie-calc-wrapper .results-grid {
        grid-template-columns: 1fr;
    }
    
    .calorie-calc-wrapper .macros-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .calorie-calc-wrapper .projection-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .calorie-calc-wrapper .formulas-grid,
    .calorie-calc-wrapper .tips-grid,
    .calorie-calc-wrapper .macro-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .calorie-calc-wrapper {
        padding: 2rem 1rem;
    }
    
    .calorie-calc-wrapper .calc-title {
        font-size: 2rem;
    }
    
    .calorie-calc-wrapper .form-grid {
        grid-template-columns: 1fr;
    }
    
    .calorie-calc-wrapper .macros-grid {
        grid-template-columns: 1fr;
    }
    
    .calorie-calc-wrapper .projection-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .calorie-calc-wrapper .formulas-grid,
    .calorie-calc-wrapper .tips-grid,
    .calorie-calc-wrapper .macro-info-grid {
        grid-template-columns: 1fr;
    }
    
    .calorie-calc-wrapper .activity-item {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .calorie-calc-wrapper .calc-title {
        font-size: 1.75rem;
    }
    
    .calorie-calc-wrapper .result-card {
        flex-direction: column;
        text-align: center;
    }
    
    .calorie-calc-wrapper .result-value {
        font-size: 1.75rem;
    }
    
    .calorie-calc-wrapper .projection-grid {
        grid-template-columns: 1fr;
    }
    
    .calorie-calc-wrapper .gender-buttons {
        grid-template-columns: 1fr;
    }
}