/* ===========================
   CSS Variables for Theming
   =========================== */
:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --accent-primary: #0066ff;
    --accent-secondary: #0052cc;
    --border-color: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* Gradient Colors */
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-vision: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-primary: #3b8efd;
    --accent-secondary: #2f73c9;
    --border-color: #30363d;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    --gradient-vision: linear-gradient(135deg, #1a2642 0%, #1e3c72 100%);
}

/* ===========================
   Global Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Cairo', 'Roboto', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

body[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

body[dir="ltr"] {
    direction: ltr;
    text-align: left;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Controls (Theme & Language)
   =========================== */
.controls-wrapper {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}

body[dir="rtl"] .controls-wrapper {
    left: auto;
    right: 20px;
}

.control-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow);
}

.control-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-hover);
    border-color: var(--accent-primary);
}

.control-btn .lang-text {
    font-size: 0.9rem;
    font-weight: 600;
}

/* ===========================
   Header & Navigation
   =========================== */
.header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: var(--bg-card);
    box-shadow: 0 2px 10px var(--shadow);
    transition: all var(--transition-normal);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.logo:hover {
    color: var(--accent-secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link:hover {
    color: var(--accent-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.profile-images {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-primary);
    box-shadow: 0 8px 24px var(--shadow);
    transition: transform var(--transition-normal);
}

.profile-img:hover {
    transform: scale(1.05);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px var(--shadow);
}

.info-item i {
    color: var(--accent-primary);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: 50%;
    font-size: 1.2rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow);
}

.social-links a:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-5px);
}

/* ===========================
   Section Styles
   =========================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ===========================
   About Section
   =========================== */
.about {
    background: var(--bg-primary);
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

/* ===========================
   Skills Section
   =========================== */
.skills {
    background: var(--bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 4px 16px var(--shadow);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 32px var(--shadow-hover);
    border-color: var(--accent-primary);
}

.skill-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: var(--gradient-1);
    color: white;
}

.skill-card:nth-child(2) .skill-icon {
    background: var(--gradient-2);
}

.skill-card:nth-child(3) .skill-icon {
    background: var(--gradient-3);
}

.skill-card:nth-child(4) .skill-icon {
    background: var(--gradient-4);
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.skill-desc {
    color: var(--text-secondary);
}

/* ===========================
   Services Section
   =========================== */
.services {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 16px var(--shadow);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 32px var(--shadow-hover);
    border-color: var(--accent-primary);
}

.service-icon {
    width: 70px;
    height: 70px;
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: var(--accent-primary);
    color: white;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.service-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===========================
   Projects Section
   =========================== */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 16px var(--shadow);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 32px var(--shadow-hover);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 102, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    color: var(--accent-primary);
    border-radius: 50%;
    font-size: 1.2rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.2);
}

.project-content {
    padding: var(--spacing-md);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: 4px 12px;
    background: var(--accent-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===========================
   Achievements Section
   =========================== */
.achievements {
    background: var(--bg-primary);
}

.achievements-list {
    max-width: 800px;
    margin: 0 auto;
}

.achievement-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 4px 12px var(--shadow);
    transition: all var(--transition-normal);
}

.achievement-item:hover {
    transform: translateX(-10px);
    box-shadow: 0 6px 20px var(--shadow-hover);
}

body[dir="ltr"] .achievement-item:hover {
    transform: translateX(10px);
}

.achievement-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
}

.achievement-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
}

/* ===========================
   Vision Section
   =========================== */
.vision {
    background: var(--gradient-vision);
    color: white;
    text-align: center;
}

.vision-content {
    max-width: 900px;
    margin: 0 auto;
}

.vision-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    font-size: 3rem;
}

.vision-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.vision-desc {
    font-size: 1.2rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-group label {
    position: absolute;
    top: 50%;
    right: var(--spacing-sm);
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    transition: all var(--transition-fast);
    background: var(--bg-card);
    padding: 0 5px;
}

body[dir="ltr"] .form-group label {
    right: auto;
    left: var(--spacing-sm);
}

.form-group textarea + label {
    top: var(--spacing-sm);
    transform: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: 0;
    font-size: 0.85rem;
    color: var(--accent-primary);
}

.submit-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-normal);
}

.submit-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-hover);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--bg-card);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-text {
    color: var(--text-secondary);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 70px);
        background: var(--bg-card);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: -4px 0 20px var(--shadow);
        transition: right var(--transition-normal);
    }
    
    body[dir="rtl"] .nav-menu {
        right: auto;
        left: -100%;
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    body[dir="rtl"] .nav-menu.active {
        right: auto;
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid,
    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-images {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-info {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .controls-wrapper {
        top: 10px;
        left: 10px;
    }
    
    body[dir="rtl"] .controls-wrapper {
        left: auto;
        right: 10px;
    }
    
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* ===========================
   Scroll Animations
   =========================== */
section {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

section:nth-child(1) { animation-delay: 0.1s; }
section:nth-child(2) { animation-delay: 0.2s; }
section:nth-child(3) { animation-delay: 0.3s; }
section:nth-child(4) { animation-delay: 0.4s; }
section:nth-child(5) { animation-delay: 0.5s; }
section:nth-child(6) { animation-delay: 0.6s; }
section:nth-child(7) { animation-delay: 0.7s; }
section:nth-child(8) { animation-delay: 0.8s; }
section:nth-child(9) { animation-delay: 0.9s; }