:root {
    --primary-color: #1fa75c;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --background-color: #ecf0f1;
    --text-color: #2c3e50;
    --card-bg: #ffffff;
    --border-color: #eaeaea;
    --header-bg: #1fa75c;
    --footer-bg: #1fa75c;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #27c46d;
    --secondary-color: #4da6e0;
    --accent-color: #ff6b6b;
    --background-color: #1a1a1a;
    --text-color: #f0f0f0;
    --card-bg: #2c2c2c;
    --border-color: #404040;
    --header-bg: #27c46d;
    --footer-bg: #27c46d;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Cairo', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

header {
    background-color: var(--header-bg);
    padding: 1rem;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem;
}

.logo img {
    width: 60px;
    height: 60px;
}

.logo-img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.1);
}

.site-title {
    display: flex;
    flex-direction: column;
}

.site-title h1 {
    margin: 0;
    font-size: 1.8rem;
    color: white;
}

.english-title {
    font-size: 1rem;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.9);
}

nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
    padding: 0;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
}

footer {
    background-color: var(--footer-bg);
    color: white;
    padding: 2rem;
    text-align: center;
}

footer a {
    color: var(--secondary-color);
}

.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(52, 152, 219, 0.9)),
                url('health-background.jpg');
    background-size: cover;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.2rem;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #c0392b;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* تنسيقات جديدة لتثبيت المحتوى */
html, body {
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
}

.main-content, 
.calculator-section, 
.articles-grid,
.exercise-categories,
.meal-grid,
.activity-schedule {
    max-width: 100%;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
}

/* تحسين تنسيق الجداول للشاشات الصغيرة */
table {
    width: 100%;
    min-width: auto;
    margin: 0;
}

/* تحسين تنسيق البطاقات للشاشات الصغيرة */
.article-card,
.feature-box,
.meal-card {
    width: 100%;
    box-sizing: border-box;
}

/* تحسين التنسيق للشاشات الصغيرة */
@media (max-width: 768px) {
    .calculator-form,
    .articles-grid,
    .features-grid,
    .meal-grid {
        padding: 1rem;
    }

    .hero-content {
        padding: 1rem;
    }

    nav ul {
        padding: 0 1rem;
    }
}

.dark-mode-btn {
    background: transparent;
    border: none;
    color: white;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.dark-mode-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.dark-mode-btn i {
    font-size: 1.2rem;
}

.article-card,
.feature-box,
.calculator-container,
.meal-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
}

.result-card, 
.feature-box, 
.article-card,
.meal-card,
.calculator-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px var(--shadow-color);
    color: var(--text-color);
}

.article-card h2,
.feature-box h3,
.meal-card h4,
.section-title {
    color: var(--primary-color);
}

.article-card p,
.feature-box p,
.meal-card p {
    color: var(--text-color);
}

[data-theme="dark"] .logo-img {
    filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.1));
}

[data-theme="dark"] .feature-icon {
    background: var(--card-bg);
}

[data-theme="dark"] .activity-schedule th {
    background: var(--primary-color);
}

[data-theme="dark"] .activity-schedule tr:hover {
    background: var(--card-bg);
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select {
    background: var(--card-bg);
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus {
    border-color: var(--primary-color);
}

[data-theme="dark"] .tab-btn {
    background: var(--card-bg);
    color: var(--text-color);
}

[data-theme="dark"] .tab-btn.active {
    background: var(--primary-color);
    color: white;
}

[data-theme="dark"] .dark-mode-btn {
    color: white;
}

[data-theme="dark"] .dark-mode-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

// تحسين تباين النصوص في الجداول
[data-theme="dark"] table {
    background: var(--card-bg);
    color: var(--text-color);
}

[data-theme="dark"] td,
[data-theme="dark"] th {
    border-color: var(--border-color);
}

// تحسين وضوح البطاقات والعناصر التفاعلية
[data-theme="dark"] .feature-box:hover,
[data-theme="dark"] .article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
}