/* ==================== CSS VARIABLES ==================== */
:root {
    /* Colors - Dark Theme (default) */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #222240;
    --bg-glass: rgba(26, 26, 46, 0.7);
    --bg-nav: rgba(10, 10, 15, 0.85);

    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b80;

    --accent-primary: #00d4ff;
    --accent-secondary: #7b2ff7;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7b2ff7 100%);
    --accent-gradient-hover: linear-gradient(135deg, #7b2ff7 0%, #00d4ff 100%);
    --accent-glow: rgba(0, 212, 255, 0.3);
    --accent-glow-secondary: rgba(123, 47, 247, 0.3);

    --border-color: rgba(255, 255, 255, 0.08);
    --border-active: rgba(0, 212, 255, 0.3);

    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 5px 25px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);

    /* Font */
    --font-ar: 'Cairo', sans-serif;
    --font-en: 'Inter', sans-serif;

    /* Sizes */
    --nav-height: 70px;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50%;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f0f8;
    --bg-glass: rgba(255, 255, 255, 0.8);
    --bg-nav: rgba(245, 245, 250, 0.9);

    --text-primary: #1a1a2e;
    --text-secondary: #555570;
    --text-muted: #8888a0;

    --accent-primary: #0099cc;
    --accent-secondary: #6a1fd0;
    --accent-glow: rgba(0, 153, 204, 0.15);
    --accent-glow-secondary: rgba(106, 31, 208, 0.15);

    --border-color: rgba(0, 0, 0, 0.08);
    --border-active: rgba(0, 153, 204, 0.3);

    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 5px 25px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 50px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(0, 153, 204, 0.1);
}

/* ==================== RESET & BASE ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-en);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

[dir="rtl"] body {
    font-family: var(--font-ar);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
    outline: none;
    border: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0 4rem;
}

.highlight {
    color: var(--accent-primary);
}

/* ==================== LOADER ==================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader__content {
    text-align: center;
}

.loader__robot {
    font-size: 3rem;
    color: var(--accent-primary);
    animation: pulse 1.5s ease-in-out infinite;
    margin-bottom: 1.5rem;
}

.loader__bar {
    width: 200px;
    height: 4px;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
}

.loader__progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 10px;
    animation: loading 2s ease-in-out forwards;
}

@keyframes loading {
    0% { width: 0; }
    100% { width: 100%; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

/* ==================== CURSOR ==================== */
.cursor, .cursor-follower {
    display: none;
}

@media (hover: hover) and (pointer: fine) {
    .cursor {
        display: block;
        position: fixed;
        width: 8px;
        height: 8px;
        background: var(--accent-primary);
        border-radius: 50%;
        pointer-events: none;
        z-index: 9999;
        transition: transform 0.1s ease;
        mix-blend-mode: difference;
    }

    .cursor-follower {
        display: block;
        position: fixed;
        width: 35px;
        height: 35px;
        border: 2px solid var(--accent-primary);
        border-radius: 50%;
        pointer-events: none;
        z-index: 9998;
        transition: transform 0.3s ease, width 0.3s ease, height 0.3s ease;
        opacity: 0.5;
    }
}

/* ==================== NAVIGATION ==================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav__container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav__logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

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

.nav__link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
    border-radius: 2px;
}

.nav__link:hover,
.nav__link.active {
    color: var(--accent-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav__theme {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.nav__theme:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

/* Language Toggle Button */
.nav__lang {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
    font-family: var(--font-ar);
}

.nav__lang i {
    font-size: 1rem;
    color: var(--accent-primary);
}

.nav__lang:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.nav__lang:hover i {
    color: white;
}

.nav__toggle, .nav__close {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* Mobile Nav */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background: var(--bg-secondary);
        padding: 5rem 2rem 2rem;
        transition: right var(--transition-normal);
        z-index: 1001;
        border-left: 1px solid var(--border-color);
    }

    .nav__menu.show-menu {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
    }

    .nav__link {
        font-size: 1.1rem;
    }

    .nav__close {
        display: flex;
        position: absolute;
        top: 1.5rem;
        left: 1.5rem;
        font-size: 1.5rem;
    }
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.8rem;
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: var(--font-en);
}

[dir="rtl"] .btn {
    font-family: var(--font-ar);
}

.btn--primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 5px 20px var(--accent-glow);
}

.btn--primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn--outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn--outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ==================== SECTION HEADER ==================== */
.section__header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section__subtitle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1.2rem;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.section__subtitle i {
    font-size: 1rem;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-height);
}

.hero__canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.4;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero__title-highlight {
    display: block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2.5rem;
    margin-top: 0.5rem;
}

.hero__description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero__stats {
    display: flex;
    gap: 2.5rem;
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    font-family: var(--font-en);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__stat-plus {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.hero__stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* Hero Image */
.hero__image-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
    margin: 0 auto;
}

.hero__image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: var(--accent-gradient);
    filter: blur(80px);
    opacity: 0.3;
    border-radius: 50%;
    animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.2; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.4; transform: translate(-50%, -50%) scale(1.1); }
}

.hero__img {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.hero__image-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 350px;
    height: 350px;
    transform: translate(-50%, -50%);
    animation: orbit 20s linear infinite;
    z-index: 1;
}

@keyframes orbit {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero__orbit-item {
    position: absolute;
    width: 45px;
    height: 45px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 1.2rem;
    box-shadow: var(--shadow-sm);
    animation: counterOrbit 20s linear infinite;
}

@keyframes counterOrbit {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

.hero__orbit-item:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.hero__orbit-item:nth-child(2) { top: 50%; right: 0; transform: translateY(-50%); }
.hero__orbit-item:nth-child(3) { bottom: 0; left: 50%; transform: translateX(-50%); }
.hero__orbit-item:nth-child(4) { top: 50%; left: 0; transform: translateY(-50%); }

/* Hero Scroll */
.hero__scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.hero__scroll-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: scrollBounce 2s ease-in-out infinite;
}

.hero__scroll-btn i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* ==================== ABOUT ==================== */
.about__container {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 4rem;
    align-items: center;
}

.about__image-wrapper {
    position: relative;
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
}

.about__img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.about__experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--accent-gradient);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-md);
}

.about__experience-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-en);
}

.about__experience-text {
    font-size: 0.75rem;
    opacity: 0.9;
}

.about__heading {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.about__text {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 2rem;
}

.about__info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.about__info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.about__info-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.about__info-item i {
    font-size: 1.3rem;
    color: var(--accent-primary);
}

.about__info-item h4 {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.about__info-item p {
    font-size: 0.9rem;
    font-weight: 600;
}

.about__social {
    display: flex;
    gap: 0.75rem;
}

.about__social-link {
    width: 45px;
    height: 45px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.about__social-link:hover {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
}

/* ==================== SKILLS ==================== */
.skills__container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skills__category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.skills__category:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.skills__category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.skills__category-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.skills__category-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.skills__list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.skill__item {
    width: 100%;
}

.skill__info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill__name {
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-en);
}

.skill__percentage {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    font-family: var(--font-en);
}

.skill__bar {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 10px;
    overflow: hidden;
}

.skill__progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 10px;
    width: 0;
    transition: width 1.5s ease-in-out;
}

/* ==================== PROJECTS ==================== */
.projects__filters {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.projects__filter {
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    font-family: var(--font-en);
}

[dir="rtl"] .projects__filter {
    font-family: var(--font-ar);
}

.projects__filter:hover,
.projects__filter.active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 5px 15px var(--accent-glow);
}

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

.project__card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent-primary);
}

.project__image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.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, 0, 0, 0.6);
    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;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    transform: scale(0);
    transition: transform var(--transition-normal);
}

.project__card:hover .project__link {
    transform: scale(1);
}

.project__info {
    padding: 1.5rem;
}

.project__category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.1);
    padding: 0.2rem 0.8rem;
    border-radius: var(--radius-xl);
    margin-bottom: 0.75rem;
}

.project__title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-family: var(--font-en);
}

.project__description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project__tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project__tags span {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: var(--font-en);
}

/* ==================== CERTIFICATES ==================== */
.certificates__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.certificate__card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.certificate__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent-primary);
}

.certificate__image {
    height: 200px;
    overflow: hidden;
}

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

.certificate__card:hover .certificate__image img {
    transform: scale(1.05);
}

.certificate__info {
    padding: 1.2rem;
}

.certificate__title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.certificate__issuer {
    font-size: 0.85rem;
    color: var(--accent-primary);
    margin-bottom: 0.3rem;
}

.certificate__date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.certificate__placeholder {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.certificate__placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: var(--accent-primary);
    opacity: 0.5;
}

/* ==================== TIMELINE ==================== */
.timeline__container {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 50px;
}

[dir="rtl"] .timeline__container {
    padding-left: 0;
    padding-right: 50px;
}

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

[dir="rtl"] .timeline__container::before {
    left: auto;
    right: 20px;
}

.timeline__item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 40px;
}

[dir="rtl"] .timeline__item {
    padding-left: 0;
    padding-right: 40px;
}

.timeline__dot {
    position: absolute;
    left: -40px;
    top: 5px;
    width: 14px;
    height: 14px;
    background: var(--accent-gradient);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--accent-primary);
}

.timeline__content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all var(--transition-fast);
}

[dir="rtl"] .timeline__dot {
    left: auto;
    right: -40px;
}

.timeline__content:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

[dir="rtl"] .timeline__content:hover {
    transform: translateX(-5px);
}

.timeline__date {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.timeline__text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== CONTACT ==================== */
.contact__container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: start;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact__card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact__card:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

[dir="rtl"] .contact__card:hover {
    transform: translateX(-5px);
}

.contact__card-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
}

.contact__card-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.2rem;
}

.contact__card-data {
    font-size: 0.95rem;
    font-weight: 600;
}

.contact__form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.contact__form-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact__input-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.contact__input-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    z-index: 1;
}

[dir="rtl"] .contact__input-wrapper i {
    left: auto;
    right: 1rem;
}

.contact__textarea + i,
.contact__input-wrapper:has(.contact__textarea) i {
    top: 1.2rem;
    transform: none;
}

.contact__input {
    width: 100%;
    padding: 0.9rem 1rem 0.9rem 2.8rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

[dir="rtl"] .contact__input {
    padding-left: 1rem;
    padding-right: 2.8rem;
}

.contact__input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.contact__textarea {
    min-height: 150px;
    resize: vertical;
}

.contact__btn {
    width: 100%;
    justify-content: center;
}

.contact__status {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    min-height: 1.5rem;
}

.contact__status.success {
    color: #10b981;
}

.contact__status.error {
    color: #ef4444;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
}

.footer__container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer__logo i {
    color: var(--accent-primary);
    font-size: 1.3rem;
}

.footer__description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer__links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--accent-primary);
    padding-left: 5px;
}

[dir="rtl"] .footer__links a:hover {
    padding-left: 0;
    padding-right: 5px;
}

.footer__social-links {
    display: flex;
    gap: 0.75rem;
}

.footer__social-links a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.footer__social-links a:hover {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
}

.footer__bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    text-align: center;
}

.footer__bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 45px;
    height: 45px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ==================== LIGHTBOX ==================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.lightbox__close {
    position: absolute;
    top: 2rem;
    left: 2rem;
    width: 45px;
    height: 45px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lightbox__close:hover {
    background: var(--accent-primary);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__content {
        order: 1;
    }

    .hero__image {
        order: 0;
    }

    .hero__description {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__image-wrapper {
        width: 280px;
        height: 280px;
    }

    .about__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about__info-grid {
        grid-template-columns: 1fr;
    }

    .about__social {
        justify-content: center;
    }

    .skills__container {
        grid-template-columns: 1fr;
    }

    .contact__container {
        grid-template-columns: 1fr;
    }

    .footer__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer__social-links {
        justify-content: center;
    }

    .footer__links ul {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .hero__title {
        font-size: 2.5rem;
    }

    .hero__title-highlight {
        font-size: 1.8rem;
    }

    .section__title {
        font-size: 2rem;
    }

    .section {
        padding: 4rem 0 2rem;
    }

    .hero__stats {
        flex-direction: row;
        gap: 1.5rem;
    }

    .contact__form-group {
        grid-template-columns: 1fr;
    }

    .projects__grid {
        grid-template-columns: 1fr;
    }

    .certificates__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 2rem;
    }

    .hero__title-highlight {
        font-size: 1.5rem;
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ==================== BILINGUAL SUPPORT ==================== */
/* Default: Show English, Hide Arabic */
.lang-ar {
    display: none !important;
}

/* Arabic mode: Show Arabic, Hide English */
html[lang="ar"] .lang-ar {
    display: revert !important;
}

html[lang="ar"] .lang-en {
    display: none !important;
}

/* RTL-specific nav underline */
[dir="rtl"] .nav__link::after {
    left: auto;
    right: 0;
}

/* RTL arrow flip */
[dir="rtl"] .btn-arrow {
    transform: scaleX(-1);
}

/* RTL back-to-top position */
[dir="rtl"] .back-to-top {
    right: auto;
    left: 2rem;
}

/* RTL about badge */
[dir="rtl"] .about__experience-badge {
    right: auto;
    left: -20px;
}

/* RTL lightbox close */
[dir="rtl"] .lightbox__close {
    left: auto;
    right: 2rem;
}

/* RTL mobile nav */
@media (max-width: 768px) {
    [dir="ltr"] .nav__menu {
        right: -100%;
    }
    
    [dir="ltr"] .nav__menu.show-menu {
        right: 0;
    }
}