/* ============================================
   Programma Dieta Andrea - Stylesheet
   Design Mobile-First & Responsive
   ============================================ */

/* --- Variabili CSS --- */
:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #81C784;
    --secondary-color: #FF9800;
    --secondary-dark: #F57C00;
    --accent-color: #2196F3;
    --danger-color: #f44336;
    --success-color: #4CAF50;
    
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #546e7a;
    --text-light: #90a4ae;
    
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.15);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --transition: all 0.3s ease;
}

/* --- Reset & Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: var(--spacing-sm);
}

/* --- Container --- */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: var(--spacing-lg);
}

/* --- Header --- */
.header {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-sm);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    animation: fadeInDown 0.8s ease;
}

.header .subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease;
}

/* --- Cards --- */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: fadeInUp 0.6s ease;
}

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

.card h2 {
    color: var(--primary-dark);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--primary-light);
    padding-bottom: var(--spacing-xs);
    display: inline-block;
}

.card h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* --- Intro Section --- */
.intro-section .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    text-align: center;
    margin-top: var(--spacing-sm);
}

/* --- Calculator Form --- */
.tdee-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

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

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    padding: var(--spacing-sm);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

.form-group input::placeholder {
    color: var(--text-light);
}

/* --- Buttons --- */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-align: center;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    margin-top: var(--spacing-xs);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #2E7D32);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    width: 100%;
    margin-top: var(--spacing-sm);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-dark), #E65100);
    transform: translateY(-2px);
}

/* --- Result Box --- */
.result-box {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-left: 5px solid var(--primary-color);
    animation: slideIn 0.5s ease;
}

.result-box h3 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.result-item {
    background: white;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.result-item.highlight-item {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.result-item.highlight-item .result-label,
.result-item.highlight-item .result-unit {
    color: rgba(255, 255, 255, 0.9);
}

.result-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.2;
}

.highlight-item .result-value {
    color: white;
}

.result-unit {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* --- Macros Section --- */
.macros-section {
    background: white;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin-top: var(--spacing-sm);
}

.macros-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.macros-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xs);
}

.macro-item {
    text-align: center;
    padding: var(--spacing-xs);
    background: #f5f7fa;
    border-radius: var(--border-radius-sm);
}

.macro-name {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.macro-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
}

.macro-calc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
}

/* --- Meal Plan --- */
.section-desc {
    font-style: italic;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.meal-plan {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.meal-card {
    background: #fafafa;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    transition: var(--transition);
}

.meal-card:hover {
    border-color: var(--primary-light);
    background: #f1f8e9;
}

.meal-card.completed {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border-color: var(--primary-color);
    opacity: 0.8;
}

.meal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid #e0e0e0;
}

.meal-header h3 {
    font-size: 1.1rem;
    margin: 0;
}

.meal-calories {
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-weight: 600;
    background: #fff3e0;
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
}

.meal-items {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.meal-items li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* --- Checkbox Custom --- */
.meal-tracker {
    margin-top: var(--spacing-xs);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 24px;
    height: 24px;
    background: #e0e0e0;
    border-radius: 6px;
    margin-right: var(--spacing-xs);
    position: relative;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 1rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* --- Daily Progress --- */
.daily-progress {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    text-align: center;
}

.daily-progress h3 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.progress-bar-container {
    background: #e0e0e0;
    border-radius: 20px;
    height: 30px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    height: 100%;
    width: 0%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: width 0.5s ease;
    border-radius: 20px;
}

.progress-text {
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    padding: 0 var(--spacing-sm);
}

.progress-stats {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* --- Tips Section --- */
.tips-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.tip-card {
    background: linear-gradient(135deg, #fff3e0, #ffe0b2);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.tip-card:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.tip-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.tip-content h3 {
    color: var(--secondary-dark);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.tip-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* --- Footer --- */
.footer {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-sm);
    color: white;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.footer p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.footer-note {
    font-size: 0.85rem;
    font-style: italic;
    opacity: 0.8;
}

.footer-date {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: var(--spacing-sm);
}

/* --- Animations --- */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* --- Responsive Design --- */

/* Tablet (600px+) */
@media (min-width: 600px) {
    .tdee-form {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-group:last-child {
        grid-column: 1 / -1;
    }
    
    .btn-primary {
        grid-column: 1 / -1;
    }
    
    .result-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tips-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .header h1 {
        font-size: 2.5rem;
    }
}

/* Desktop (900px+) */
@media (min-width: 900px) {
    body {
        padding: var(--spacing-lg);
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .macros-grid {
        gap: var(--spacing-sm);
    }
    
    .meal-plan {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    
    .meal-card:first-child {
        grid-column: 1 / -1;
    }
}

/* Large Desktop (1200px+) */
@media (min-width: 1200px) {
    .container {
        max-width: 1000px;
    }
    
    .tips-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Print Styles --- */
@media print {
    body {
        background: white;
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
    
    .btn {
        display: none;
    }
    
    .meal-tracker {
        display: none;
    }
}