/* Font Imports */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Lato:wght@300;400;700&family=Amiri:wght@400;700&family=Cairo:wght@400;600;700&display=swap');

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #38bdf8;
    --text-main: #334155;
    --text-light: #64748b;
    --white: #ffffff;
    --bg-color: #f8fafc;
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Lato', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Arabic Specific Typography */
body.ar {
    font-family: 'Cairo', 'Amiri', sans-serif;
}

h1,
h2,
h3,
h4 {
    font-family: 'Poppins', sans-serif;
    color: var(--primary);
}

body.ar h1,
body.ar h2,
body.ar h3,
body.ar h4 {
    font-family: 'Cairo', sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.95rem;
}

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

/* Language Selector & Buttons */
.lang-selector {
    display: flex;
    gap: 10px;
    align-items: center;
    background: #f1f5f9;
    padding: 5px;
    border-radius: 8px;
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-light);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    color: var(--primary);
    background: #e2e8f0;
}

.lang-btn.active {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    color: var(--white);
    padding: 5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid var(--white);
    object-fit: cover;
    object-position: center 20%;
    margin-bottom: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

.hero h1 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero .subtitle {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 2rem;
}

/* Container & Grid */
.container {
    max-width: 1100px;
    margin: 3rem auto;
    padding: 0 2rem;
    flex-grow: 1;
}

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

.card,
.project-card,
.paper-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
}

.project-card,
.paper-card {
    flex-direction: row;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* RTL Support details for cards */
body.ar .project-card,
body.ar .paper-card {
    text-align: right;
}

body.ar .project-link i,
body.ar .btn-card i {
    margin-left: 5px;
    margin-right: 0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-color: var(--accent);
}

.card-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.btn-card {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #eff6ff;
    color: var(--primary);
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
}

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

footer {
    background: var(--primary-light);
    color: var(--text-light);
    text-align: center;
    padding: 2rem;
    margin-top: auto;
    font-size: 0.9rem;
}

.page-header {
    background: var(--white);
    padding: 3rem 2rem;
    border-bottom: 1px solid #e2e8f0;
    margin-bottom: 2rem;
}

.tech-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.tag {
    background: #f1f5f9;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-main);
    font-weight: 600;
}

.project-link {
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* 
   STRICT LANGUAGE SWITCHING LOGIC 
   Using !important to prevent any leakage or mixed content
*/

/* 1. Reset: Hide ALL language specific content by default */
.lang-es,
.lang-en,
.lang-ar {
    display: none !important;
}

/* 2. Show only relevant content based on body class */
body.es .lang-es {
    display: inline !important;
}

body.es div.lang-es,
body.es h1.lang-es,
body.es h2.lang-es,
body.es h3.lang-es,
body.es p.lang-es,
body.es li.lang-es {
    display: block !important;
}

body.en .lang-en {
    display: inline !important;
}

body.en div.lang-en,
body.en h1.lang-en,
body.en h2.lang-en,
body.en h3.lang-en,
body.en p.lang-en,
body.en li.lang-en {
    display: block !important;
}

body.ar .lang-ar {
    display: inline !important;
}

body.ar div.lang-ar,
body.ar h1.lang-ar,
body.ar h2.lang-ar,
body.ar h3.lang-ar,
body.ar p.lang-ar,
body.ar li.lang-ar {
    display: block !important;
}


/* Responsive & RTL */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Mobile menu TODO */
    }

    .project-card,
    .paper-card {
        flex-direction: column;
    }
}