/* Base & CSS Variables */
:root {
    /* Light Mode - Comfortable Colors */
    --primary-color: #0f172a; /* Slate 900 */
    --secondary-color: #0ea5e9; /* Sky 500 */
    --text-primary: #334155; /* Slate 700 */
    --text-secondary: #64748b; /* Slate 500 */
    --bg-light: #f8fafc; /* Slate 50 */
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.95);
    
    --transition: all 0.3s ease-in-out;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body.dark-mode {
    /* Dark Mode - Comfortable to the eyes */
    --primary-color: #f1f5f9; /* Slate 100 */
    --secondary-color: #38bdf8; /* Sky 400 */
    --text-primary: #e2e8f0; /* Slate 200 */
    --text-secondary: #94a3b8; /* Slate 400 */
    --bg-light: #020617; /* Slate 950 */
    --bg-white: #0f172a; /* Slate 900 */
    --border-color: #1e293b;
    --card-bg: #1e293b;
    --nav-bg: rgba(15, 23, 42, 0.95);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    scroll-behavior: smooth;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[dir="rtl"] body {
    font-family: 'Cairo', sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; height: auto; }

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding { padding: 100px 0; }
.bg-light { background-color: var(--bg-light); }
.text-center { text-align: center; }

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    color: var(--primary-color);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

.highlight { color: var(--secondary-color); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--secondary-color);
    color: #ffffff !important; 
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--secondary-color);
    color: var(--secondary-color) !important;
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--bg-light);
}

.btn-block { display: block; width: 100%; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow);
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-color);
}

.nav-links a:hover { color: var(--secondary-color); }

.lang-switch {
    font-weight: 700;
    background: var(--bg-light);
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--bg-white);
    padding-top: 80px; 
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background-color: rgba(14, 165, 233, 0.1);
    color: var(--secondary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    border: 1px solid var(--secondary-color);
}

.upwork-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 2rem;
    background-color: var(--bg-light);
    padding: 10px 20px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
}

.upwork-badge img {
    height: 25px;
}

.top-rated-tag {
    background: #14a800;
    color: white;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.hero h1 { font-size: 3.5rem; margin-bottom: 1rem; }
.hero h2 { font-size: 2rem; color: var(--text-secondary); margin-bottom: 1.5rem; font-weight: 600; }
.hero p { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 2rem; max-width: 500px; }

.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-blob {
    position: absolute;
    width: 450px;
    height: 450px;
    background-color: var(--secondary-color);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    animation: morph 12s ease-in-out infinite;
    opacity: 0.15;
    z-index: 0;
}

.hero-image {
    position: relative;
    z-index: 1;
    width: 380px;
    height: 380px;
    object-fit: cover;
    border-radius: 30px;
    box-shadow: var(--shadow-hover);
    border: 5px solid var(--bg-white);
}

@keyframes morph {
    0%, 100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
    34% { border-radius: 70% 30% 50% 50% / 30% 30% 70% 70%; }
    67% { border-radius: 100% 60% 60% 100% / 100% 100% 60% 60%; }
}

/* About Section */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.about-text p { font-size: 1.1rem; margin-bottom: 1.5rem; color: var(--text-secondary); }

.achievements-box {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-top: 2rem;
}
[dir="ltr"] .achievements-box { border-left: 4px solid var(--secondary-color); }
[dir="rtl"] .achievements-box { border-right: 4px solid var(--secondary-color); }

.achievements-box h3 { margin-bottom: 1rem; font-size: 1.3rem; }
.achievements-list li { margin-bottom: 0.8rem; display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--text-primary); }

.skills-wrapper h3 { margin-bottom: 1.5rem; font-size: 1.5rem; }
.skills-container { display: flex; flex-wrap: wrap; gap: 1rem; }
.skill-tag {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.skill-tag:hover {
    transform: translateY(-3px);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}
.highlight-skill {
    border-color: var(--secondary-color);
    background-color: rgba(14, 165, 233, 0.05);
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--card-bg);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    border-top: 4px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-top-color: var(--secondary-color);
}
.service-icon { font-size: 2.5rem; margin-bottom: 1.5rem; color: var(--secondary-color); }
.service-card h3 { margin-bottom: 1rem; font-size: 1.3rem; }
.service-card p { color: var(--text-secondary); }

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.portfolio-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.portfolio-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    background: #000;
}
.video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

.placeholder-gradient {
    height: 220px;
    background: linear-gradient(135deg, #0ea5e9, #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.portfolio-content { padding: 2rem; }
.portfolio-content h3 { margin-bottom: 1rem; font-size: 1.25rem; line-height: 1.4; }
.portfolio-content p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.95rem; }
.portfolio-links { display: flex; gap: 1rem; flex-wrap: wrap; }

.link-btn {
    font-weight: 600;
    color: #fff !important;
    background-color: var(--secondary-color);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.link-btn:hover { opacity: 0.9; }

.link-btn.outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--primary-color) !important;
}
.link-btn.outline:hover { border-color: var(--secondary-color); color: var(--secondary-color) !important; }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: block;
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-white);
    margin: 5% auto;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 800px;
    border-radius: 16px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: translateY(-50px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.close-modal {
    color: var(--text-secondary);
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
    z-index: 10;
}
[dir="rtl"] .close-modal {
    right: auto;
    left: 20px;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--primary-color);
    text-decoration: none;
}

/* Contact Section */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: flex-start; }
.contact-info p { color: var(--text-secondary); margin-bottom: 2rem; font-size: 1.1rem; }
.contact-details p { margin-bottom: 1rem; font-size: 1.1rem; color: var(--primary-color); display: flex; align-items: center; gap: 10px; }

.contact-form-container {
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: var(--primary-color); }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--bg-light);
    color: var(--text-primary);
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
    background-color: var(--bg-white);
}

/* Footer */
footer {
    background-color: var(--bg-white);
    color: var(--text-secondary);
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}
.footer-logo { font-size: 1.8rem; font-weight: 800; margin-bottom: 1.5rem; color: var(--primary-color); }
.social-links { display: flex; justify-content: center; gap: 2rem; margin-bottom: 2rem; }
.social-links a { color: var(--text-secondary); font-weight: 600; transition: var(--transition); }
.social-links a:hover { color: var(--secondary-color); transform: translateY(-3px); display: inline-block; }

/* Custom Calm Animations */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: none;
}

.fade-up {
    transform: translateY(30px);
}

.fade-down {
    transform: translateY(-30px);
}

.fade-right {
    transform: translateX(-30px);
}

[dir="rtl"] .fade-right {
    transform: translateX(30px); /* Reverse for RTL */
}

.fade-left {
    transform: translateX(30px);
}

[dir="rtl"] .fade-left {
    transform: translateX(-30px); /* Reverse for RTL */
}

.fade-in {
    transform: scale(0.95);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 992px) {
    .hero-content, .about-grid, .contact-layout { grid-template-columns: 1fr; }
    .hero { text-align: center; padding-top: 120px; }
    .hero-buttons { justify-content: center; }
    .hero-image-wrapper { margin-top: 3rem; }
    .upwork-badge { margin: 0 auto 2rem; justify-content: center; }
    [dir="rtl"] .contact-info .section-title { text-align: center !important; }
}

@media (max-width: 768px) {
    .mobile-menu-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow);
    }
    .nav-links.active { display: flex; }
    .hero h1 { font-size: 2.8rem; }
    .hero h2 { font-size: 1.5rem; }
    .modal-content { padding: 1.5rem; margin: 10% auto; }
}

/* --- Infinite Tech Stack Carousel --- */
.tech-carousel {
    overflow: hidden;
    padding: 40px 0;
    background: var(--bg-color);
    position: relative;
    white-space: nowrap;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.tech-carousel::before,
.tech-carousel::after {
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    content: "";
    z-index: 2;
}

.tech-carousel::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-color) 0%, transparent 100%);
}

.tech-carousel::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-color) 0%, transparent 100%);
}

.tech-carousel-track {
    display: inline-block;
    animation: scroll 35s linear infinite;
}

.tech-carousel-track:hover {
    animation-play-state: paused;
}

.tech-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 0 40px;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}

.tech-item:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.tech-item i {
    font-size: 2.5rem;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* RTL Carousel Adjustment */
html[dir="rtl"] .tech-carousel-track {
    animation: scroll-rtl 35s linear infinite;
}

@keyframes scroll-rtl {
    0% { transform: translateX(0); }
    100% { transform: translateX(50%); }
}

/* --- Experience Timeline --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: 4px;
    opacity: 0.2;
}

html[dir="rtl"] .timeline::after {
    left: auto;
    right: 50%;
    margin-right: -2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--bg-color);
    border: 4px solid var(--primary-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

html[dir="rtl"] .timeline-item::after {
    right: auto;
    left: -10px;
}

.left {
    left: 0;
}

html[dir="rtl"] .left {
    left: auto;
    right: 0;
}

.right {
    left: 50%;
}

html[dir="rtl"] .right {
    left: auto;
    right: 50%;
}

.right::after {
    left: -10px;
}

html[dir="rtl"] .right::after {
    left: auto;
    right: -10px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: var(--card-bg);
    position: relative;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.timeline-date {
    display: inline-block;
    padding: 5px 15px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.timeline-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 5px;
}

.timeline-company {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 15px;
}

@media screen and (max-width: 600px) {
    .timeline::after { left: 31px; }
    html[dir="rtl"] .timeline::after { left: auto; right: 31px; }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    html[dir="rtl"] .timeline-item {
        padding-left: 25px;
        padding-right: 70px;
    }
    
    .timeline-item::after { left: 21px; }
    html[dir="rtl"] .timeline-item::after { left: auto; right: 21px; }
    
    .right { left: 0%; }
    html[dir="rtl"] .right { left: auto; right: 0%; }
}