/* =========================================
   Variables & Reset
   ========================================= */
:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #666666;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --card-bg: rgba(255, 255, 255, 0.7);
    --border-color: rgba(0, 0, 0, 0.05);

    --font-heading: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --container-width: 1200px;
    --header-height: 80px;
    --radius-lg: 16px;
    --radius-md: 8px;
    --radius-full: 999px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);

    /* Project preview viewport height (KEEP CONSISTENT) */
    --project-preview-h: 220px;
}

/* Dark Mode Overrides */
body.dark-mode {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;
    --card-bg: rgba(15, 23, 42, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-heading);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* RTL Support */
html[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%;
    display: block;
}

/* =========================================
   Layout & Utilities
   ========================================= */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
}

.accent-text {
    color: var(--accent-color);
}

/* Glassmorphism Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

body.dark-mode .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-outline {
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background-color: var(--accent-color);
    color: white;
}

/* =========================================
   3D Background Canvas
   ========================================= */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

body.dark-mode #bg-canvas {
    opacity: 0.4;
}

/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

body.dark-mode .navbar {
    background: rgba(15, 23, 42, 0.8);
}

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

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

html[dir="rtl"] .nav-links {
    flex-direction: row-reverse;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

/* Controls (Theme/Lang) */
.controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 1px solid var(--border-color);
}

html[dir="rtl"] .controls {
    margin-left: 0;
    padding-left: 0;
    margin-right: var(--spacing-md);
    padding-right: var(--spacing-md);
    border-left: none;
    border-right: 1px solid var(--border-color);
}

.icon-btn,
.text-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover,
.text-btn:hover {
    color: var(--accent-color);
}

.text-btn {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

/* =========================================
   Hero Section
   ========================================= */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
    z-index: 2;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

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

.image-halo {
    position: absolute;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    z-index: -1;
    animation: pulse-halo 4s ease-in-out infinite;
}

body.dark-mode .image-halo {
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, rgba(15, 23, 42, 0) 70%);
}

.hero-image {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    border: 4px solid white;
}

body.dark-mode .hero-image {
    border-color: #1e293b;
}

@keyframes pulse-halo {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }

    50% {
        transform: scale(1.1);
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 0.7;
    }
}

/* =========================================
   About Section
   ========================================= */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.tech-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.tech-list li {
    font-size: 0.95rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
}

.tech-list li::before {
    content: "•";
    color: var(--accent-color);
    margin-right: 8px;
    font-weight: bold;
}

html[dir="rtl"] .tech-list li::before {
    margin-right: 0;
    margin-left: 8px;
}

.cv-download {
    margin-top: var(--spacing-sm);
}

/* =========================================
   Skills Section
   ========================================= */
.skills-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skills-category h4 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.badge {
    padding: 6px 14px;
    background: #f3f4f6;
    color: var(--text-color);
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition);
}

body.dark-mode .badge {
    background: #1e293b;
    color: #cbd5e1;
}

.badge:hover {
    background: var(--accent-color);
    color: white;
}

/* =========================================
   Projects Section
   ========================================= */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* ====== NEW: Project Preview (Browser Frame + Hover Scroll) ====== */
.project-preview {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.02);
    margin-bottom: var(--spacing-sm);
}

body.dark-mode .project-preview {
    background: rgba(255, 255, 255, 0.03);
}

.preview-topbar {
    height: 34px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 12px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.02);
}

body.dark-mode .preview-topbar {
    background: rgba(255, 255, 255, 0.03);
}

.preview-topbar .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.25);
}

body.dark-mode .preview-topbar .dot {
    background: rgba(255, 255, 255, 0.25);
}

.preview-viewport {
    height: var(--project-preview-h);
    overflow: hidden;
    position: relative;
}

/* Image motion */
.preview-img {
    width: 100%;
    height: auto;
    display: block;
    transform: translateY(0);
    transition: transform 3.2s cubic-bezier(0.1, 0, 0.3, 1);
    will-change: transform;
}

/* Hover/Preview scroll */
.project-card:hover .preview-img,
.project-card.is-previewing .preview-img {
    transform: translateY(calc(-100% + var(--project-preview-h)));
}

/* Fallback if image fails */
.preview-fallback {
    height: var(--project-preview-h);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.04);
}

body.dark-mode .preview-fallback {
    background: rgba(255, 255, 255, 0.05);
}

/* ====== Existing project styles (kept) ====== */
.project-info h3 {
    margin-bottom: 4px;
    font-size: 1.25rem;
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-sm);
}

.tech-tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: #f8fafc;
    padding: 2px 6px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

body.dark-mode .tech-tag {
    background: #0f172a;
    border-color: #334155;
    color: #94a3b8;
}

.project-highlights {
    list-style-type: none;
    margin-bottom: var(--spacing-sm);
}

.project-highlights li {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-left: 12px;
    position: relative;
    margin-bottom: 4px;
}

html[dir="rtl"] .project-highlights li {
    padding-left: 0;
    padding-right: 12px;
}

.project-highlights li::before {
    content: "-";
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

html[dir="rtl"] .project-highlights li::before {
    left: auto;
    right: 0;
}

.project-links {
    margin-top: auto;
    display: flex;
    gap: var(--spacing-sm);
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
    .preview-img {
        transition: none !important;
    }
}

/* =========================================
   Experience Section
   ========================================= */
.timeline {
    position: relative;
    max-width: 800px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--border-color);
    margin-left: 20px;
}

html[dir="rtl"] .timeline::before {
    left: auto;
    right: 0;
    margin-left: 0;
    margin-right: 20px;
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-md);
    padding-left: 60px;
}

html[dir="rtl"] .timeline-item {
    padding-left: 0;
    padding-right: 60px;
}

.timeline-date {
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
    background: var(--bg-color);
    padding: 0 4px;
    z-index: 2;
    transform: rotate(-90deg) translateX(-10px);
    width: 40px;
    text-align: center;
}

html[dir="rtl"] .timeline-date {
    left: auto;
    right: 0;
    transform: rotate(90deg) translateX(-10px);
}

.timeline-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

/* =========================================
   Contact & Footer
   ========================================= */
.contact-container {
    max-width: 600px;
    text-align: center;
}

.contact-card h2 {
    margin-bottom: var(--spacing-sm);
}

.contact-links {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.contact-link {
    font-size: 1.25rem;
    color: var(--accent-color);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.footer-container {
    text-align: center;
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: var(--spacing-xl);
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 4rem;
        --project-preview-h: 240px;
        /* ممكن تزودها للموبايل */
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-md);
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image-wrapper {
        order: -1;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }
}