/* ====================================
   Mohamed Sayed - Portfolio CSS
   Modern, Premium Design System
   ==================================== */

/* ====================================
   CSS Variables & Root
   ==================================== */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #00d4ff 0%, #7b2ff7 50%, #f107a3 100%);
    --primary-blue: #00d4ff;
    --primary-purple: #7b2ff7;
    --primary-pink: #f107a3;
    --primary-orange: #ff6b35;
    --primary-green: #00f5a0;

    /* Background Colors */
    --dark-bg: #0a0a0a;
    --dark-bg-secondary: #0f0f1a;
    --card-bg: rgba(0, 0, 0, 0.6);
    --glass-bg: rgba(255, 255, 255, 0.05);

    /* Text Colors */
    --text-light: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    --text-dark-muted: #475569;

    /* Shadows */
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
    --shadow-glow-purple: 0 0 30px rgba(123, 47, 247, 0.3);
    --shadow-glow-pink: 0 0 30px rgba(241, 7, 163, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50px;
}

/* Light theme variables */
[data-theme="light"] {
    --dark-bg: #f8fafc;
    --dark-bg-secondary: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.95);
    --glass-bg: rgba(0, 0, 0, 0.02);
    --text-light: #1e293b;
    --text-muted: #475569;
}

/* ====================================
   Reset & Base Styles
   ==================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

html,
body {
    max-width: 100vw;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background: var(--dark-bg);
}

/* Selection styling */
::selection {
    background: var(--primary-purple);
    color: white;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 3px;
}

/* ====================================
   Custom Scrollbar
   ==================================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #1a1a2e;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    border-radius: 10px;
    border: 2px solid #1a1a2e;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-pink));
}

/* ====================================
   Animated Background - OPTIMIZED
   ==================================== */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, #1a1a2e, #16213e, #0f3460, #533483);
    background-size: 400% 400%;
    animation: gradientShift 30s ease infinite;
    /* Slower = less CPU */
    z-index: -2;
    will-change: background-position;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

/* Particle Effect Container */
.particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-blue);
    border-radius: 50%;
    opacity: 0.4;
    animation: float-particle 25s infinite linear;
    /* Slower & linear = smoother */
    will-change: transform, opacity;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh);
        opacity: 0;
    }

    10% {
        opacity: 0.4;
    }

    90% {
        opacity: 0.4;
    }

    100% {
        transform: translateY(-100vh);
        opacity: 0;
    }
}

/* ====================================
   Scroll Progress Bar
   ==================================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--primary-gradient);
    z-index: 9999;
    transition: width 0.1s ease;
    box-shadow: var(--shadow-glow);
}

/* ====================================
   Navigation
   ==================================== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 2000;
    padding: 1rem 2rem;
    transition: all var(--transition-normal);
}

nav.scrolled {
    padding: 0.7rem 2rem;
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
}

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    transition: width var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--primary-blue);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 212, 255, 0.1);
    transform: rotate(180deg);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    padding: 0.5rem;
    z-index: 2002;
}

.mobile-menu-btn:hover {
    color: var(--primary-blue);
}

/* Download CV Button */
.nav-cv-btn {
    background: var(--primary-gradient);
    color: white !important;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.nav-cv-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
}

.nav-cv-btn::after {
    display: none !important;
}

/* ====================================
   Hero Section
   ==================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
    position: relative;
    padding: 6rem 1rem 4rem;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 20px;
    border: 2px solid transparent;
    border-radius: 15px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple), var(--primary-pink)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    animation: borderGlow 3s infinite alternate;
    pointer-events: none;
}

@keyframes borderGlow {
    0% {
        opacity: 0.5;
        filter: blur(0px);
    }

    100% {
        opacity: 1;
        filter: blur(2px);
    }
}

/* Floating shapes */
.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float-shape 20s infinite ease-in-out;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-blue);
    top: 10%;
    left: -150px;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--primary-purple);
    top: 60%;
    right: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--primary-pink);
    bottom: 20%;
    left: 20%;
    animation-delay: -10s;
}

@keyframes float-shape {

    0%,
    100% {
        transform: translateY(0) rotate(0deg) scale(1);
    }

    25% {
        transform: translateY(-50px) rotate(90deg) scale(1.1);
    }

    50% {
        transform: translateY(0) rotate(180deg) scale(1);
    }

    75% {
        transform: translateY(50px) rotate(270deg) scale(0.9);
    }
}

.hero-content {
    max-width: 900px;
    padding: 2rem;
    z-index: 10;
}

/* Profile Photo in Hero */
.hero-profile-photo {
    width: 200px;
    height: 240px;
    border-radius: 30%;
    object-fit: cover;
    object-position: center top;
    border: 4px solid transparent;
    background: linear-gradient(var(--dark-bg), var(--dark-bg)) padding-box,
        var(--primary-gradient) border-box;
    margin-bottom: 2rem;
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
    animation: pulse-glow 3s infinite ease-in-out;
    transition: transform var(--transition-normal);
}

.hero-profile-photo:hover {
    transform: scale(1.05) rotate(3deg);
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    }

    50% {
        box-shadow: 0 0 50px rgba(123, 47, 247, 0.4);
    }
}

/* Hero Title */
.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #ffffff 50%, var(--primary-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-text 5s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradient-text {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

/* Typing Animation */
.typing-container {
    display: inline-block;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.typing-text {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-muted);
    font-weight: 500;
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1.5rem;
    background: var(--primary-blue);
    margin-left: 5px;
    animation: blink 1s infinite;
    vertical-align: middle;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

.hero .description {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 2.5rem;
    color: #cbd5e1;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Code Accent */
.code-accent {
    font-family: 'Fira Code', 'Courier New', monospace;
    background: rgba(0, 212, 255, 0.15);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--primary-blue);
    font-size: 0.95em;
    transition: all var(--transition-normal);
}

.code-accent:hover {
    background: rgba(0, 212, 255, 0.25);
    box-shadow: var(--shadow-glow);
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    font-size: 1rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 35px rgba(0, 212, 255, 0.6);
}

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

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--dark-bg);
    transform: translateY(-4px);
    box-shadow: 0 8px 35px rgba(0, 212, 255, 0.4);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.scroll-indicator-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 15px;
    position: relative;
}

.scroll-indicator-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-blue);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 2s infinite;
}

@keyframes scroll-wheel {

    0%,
    100% {
        opacity: 1;
        top: 6px;
    }

    50% {
        opacity: 0.3;
        top: 20px;
    }
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ====================================
   Section Styles
   ==================================== */
section {
    padding: 6rem 2rem;
    position: relative;
}

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

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.title-highlight {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-style: italic;
}

/* ====================================
   About Section
   ==================================== */
.about {
    background: rgba(15, 15, 15, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #cbd5e1;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.profile-photo {
    width: 220px;
    height: 260px;
    border-radius: 30%;
    object-fit: cover;
    object-position: center top;
    border: 4px solid transparent;
    background: linear-gradient(var(--dark-bg), var(--dark-bg)) padding-box,
        var(--primary-gradient) border-box;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-glow);
    display: block;
    margin-left: auto;
    margin-right: auto;
    transition: all var(--transition-normal);
}

.profile-photo:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

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

.stat-number {
    font-size: clamp(2.5rem, 5vw, 3rem);
    font-weight: bold;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.5rem;
}

.stat-item span:last-child {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ====================================
   Certifications Section
   ==================================== */
.certifications {
    background: rgba(10, 10, 10, 0.9);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.certification-card {
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.certification-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-glow-purple);
}

.certification-title {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.certification-card p {
    color: #cbd5e1;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-blue);
    text-decoration: none;
    margin-top: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.cert-link:hover {
    color: var(--primary-pink);
    transform: translateX(5px);
}

/* ====================================
   Skills Section
   ==================================== */
.skills {
    background: rgba(10, 10, 10, 0.9);
}

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

.skill-category {
    background: linear-gradient(145deg, rgba(20, 20, 35, 0.95), rgba(15, 15, 25, 0.98));
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.skill-category::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    opacity: 0.1;
    border-radius: 0 0 0 100%;
    transition: all var(--transition-normal);
}

.skill-category:hover::after {
    width: 120px;
    height: 120px;
    opacity: 0.2;
}

.skill-category:hover {
    transform: translateY(-10px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-glow-purple);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #ffffff;
}

.skill-category h3 i {
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-blue);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all var(--transition-normal);
    cursor: default;
}

.skill-tag:hover {
    background: rgba(123, 47, 247, 0.2);
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-glow-purple);
}

/* ====================================
   Projects Section
   ==================================== */
.projects {
    background: rgba(15, 15, 15, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.project-card {
    background: linear-gradient(145deg, rgba(20, 20, 35, 0.95), rgba(15, 15, 25, 0.98));
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: rgba(123, 47, 247, 0.5);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5), 0 0 50px rgba(123, 47, 247, 0.2);
}

.project-image-wrapper {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.project-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, rgba(0, 0, 0, 0.9));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1.5rem;
    gap: 1rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.overlay-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.overlay-btn:hover {
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

.overlay-divider {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.project-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-category {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    width: fit-content;
}

.category-featured {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 212, 255, 0.1));
    color: var(--primary-blue);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.category-web {
    background: linear-gradient(135deg, rgba(241, 7, 163, 0.2), rgba(241, 7, 163, 0.1));
    color: var(--primary-pink);
    border: 1px solid rgba(241, 7, 163, 0.3);
}

.category-desktop {
    background: linear-gradient(135deg, rgba(123, 47, 247, 0.2), rgba(123, 47, 247, 0.1));
    color: var(--primary-purple);
    border: 1px solid rgba(123, 47, 247, 0.3);
}

.project-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: #ffffff;
    transition: all var(--transition-normal);
}

.project-card:hover .project-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-card p {
    color: #94a3b8;
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.2rem;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.tech-tag {
    background: rgba(40, 40, 60, 0.8);
    color: #94a3b8;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-normal);
}

.tech-tag:hover {
    background: rgba(123, 47, 247, 0.2);
    color: var(--primary-purple);
    border-color: rgba(123, 47, 247, 0.4);
    transform: translateY(-2px);
}

.project-links {
    display: flex;
    gap: 1.5rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.project-link:hover {
    color: var(--primary-blue);
    transform: translateX(5px);
}

.project-link i {
    font-size: 1.1rem;
}

/* ====================================
   Contact Section
   ==================================== */
.contact {
    background: rgba(0, 0, 0, 0.9);
    padding-bottom: 6rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--glass-bg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
}

.contact-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-glow);
}

.contact-item i {
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    width: 30px;
    flex-shrink: 0;
}

.contact-item h4 {
    color: #ffffff;
    margin-bottom: 0.3rem;
    font-weight: 600;
}

.contact-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.contact h3 {
    color: #ffffff;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact>.container>div:last-child p {
    color: #cbd5e1;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 50%;
    font-size: 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.social-link:hover::before {
    opacity: 1;
}

.social-link:hover {
    color: white;
    border-color: transparent;
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-glow);
}

/* ====================================
   Modal Styles
   ==================================== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 3000;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    position: relative;
    max-width: 900px;
    width: 90%;
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1rem;
    border: 1px solid var(--primary-blue);
    box-shadow: var(--shadow-glow);
    animation: modal-slide-up 0.4s ease;
}

@keyframes modal-slide-up {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: -15px;
    right: -15px;
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    z-index: 10;
}

.modal-close:hover {
    transform: scale(1.1) rotate(90deg);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-md);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
    z-index: 1;
    display: none;
}

/* ====================================
   Footer - Premium Design
   ==================================== */
.footer {
    background: linear-gradient(180deg, #050505 0%, #0a0a12 100%);
    padding: 3rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: var(--primary-gradient);
}

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

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo span {
    color: inherit;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--glass-bg);
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 50%;
    font-size: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.footer-links a:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
}

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

.footer-copyright i {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

/* ====================================
   Back to Top Button
   ==================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.5);
}

/* ====================================
   Loading Screen - Premium Design
   ==================================== */
.loading-screen {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #0f0f1a 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    position: relative;
    width: 80px;
    height: 80px;
}

.loader::before,
.loader::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 4px solid transparent;
}

.loader::before {
    border-top-color: var(--primary-blue);
    border-right-color: var(--primary-purple);
    animation: loader-spin 1.2s linear infinite;
}

.loader::after {
    inset: 10px;
    border-bottom-color: var(--primary-pink);
    border-left-color: var(--primary-green);
    animation: loader-spin 0.8s linear infinite reverse;
}

@keyframes loader-spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-screen::after {
    content: 'Mohamed Sayed';
    position: absolute;
    bottom: calc(50% - 80px);
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse-text 1.5s ease-in-out infinite;
}

@keyframes pulse-text {

    0%,
    100% {
        opacity: 0.5;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

/* ====================================
   Light Theme - Premium Design
   ==================================== */
[data-theme="light"] {
    --shadow-glow: 0 0 30px rgba(123, 47, 247, 0.15);
    --shadow-glow-purple: 0 0 30px rgba(123, 47, 247, 0.2);
    --shadow-glow-pink: 0 0 30px rgba(241, 7, 163, 0.15);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .animated-bg {
    background: linear-gradient(-45deg, #f0f9ff, #faf5ff, #fff5f8, #f0fdf4);
    background-size: 400% 400%;
}

[data-theme="light"] .loading-screen {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f1f5f9 100%);
}

[data-theme="light"] nav {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .nav-links a {
    color: #475569;
}

[data-theme="light"] .nav-links a:hover {
    color: var(--primary-purple);
}

[data-theme="light"] .mobile-menu-btn {
    color: #1e293b;
}

[data-theme="light"] .mobile-menu-btn:hover {
    color: var(--primary-purple);
}

[data-theme="light"] .theme-toggle {
    border-color: rgba(0, 0, 0, 0.1);
    color: #1e293b;
}

[data-theme="light"] .theme-toggle:hover {
    border-color: var(--primary-purple);
    background: rgba(123, 47, 247, 0.1);
}

[data-theme="light"] .hero {
    color: #1e293b;
}

[data-theme="light"] .hero::before {
    opacity: 0.3;
}

[data-theme="light"] .hero h1 {
    background: linear-gradient(135deg, var(--primary-purple) 0%, #1e293b 50%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

[data-theme="light"] .hero .description {
    color: #475569;
}

[data-theme="light"] .hero-profile-photo {
    box-shadow: 0 0 40px rgba(123, 47, 247, 0.2);
}

[data-theme="light"] .scroll-indicator {
    color: #64748b;
}

[data-theme="light"] .scroll-indicator-mouse {
    border-color: #94a3b8;
}

[data-theme="light"] .about {
    background: rgba(255, 255, 255, 0.9);
    border-top-color: rgba(0, 0, 0, 0.05);
    border-bottom-color: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .about-text,
[data-theme="light"] .about-text p {
    color: #475569;
}

[data-theme="light"] .profile-photo {
    box-shadow: 0 0 30px rgba(123, 47, 247, 0.15);
}

[data-theme="light"] .profile-photo:hover {
    box-shadow: 0 0 50px rgba(123, 47, 247, 0.25);
}

[data-theme="light"] .stat-item {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .stat-item:hover {
    border-color: var(--primary-purple);
    box-shadow: 0 8px 30px rgba(123, 47, 247, 0.15);
}

[data-theme="light"] .stat-item span:last-child {
    color: #64748b;
}

[data-theme="light"] .certifications,
[data-theme="light"] .skills {
    background: rgba(248, 250, 252, 0.95);
}

[data-theme="light"] .certification-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .certification-card:hover {
    border-color: var(--primary-purple);
    box-shadow: 0 12px 40px rgba(123, 47, 247, 0.15);
}

[data-theme="light"] .certification-card p {
    color: #64748b;
}

[data-theme="light"] .skill-category {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .skill-category:hover {
    border-color: var(--primary-purple);
    box-shadow: 0 12px 40px rgba(123, 47, 247, 0.15);
}

[data-theme="light"] .skill-category h3 {
    color: #1e293b;
}

[data-theme="light"] .skill-tag {
    background: rgba(123, 47, 247, 0.08);
    color: var(--primary-purple);
    border-color: rgba(123, 47, 247, 0.15);
}

[data-theme="light"] .skill-tag:hover {
    background: rgba(123, 47, 247, 0.15);
    border-color: var(--primary-purple);
}

[data-theme="light"] .projects {
    background: rgba(255, 255, 255, 0.9);
    border-top-color: rgba(0, 0, 0, 0.05);
    border-bottom-color: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .project-card {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .project-card:hover {
    border-color: rgba(123, 47, 247, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1), 0 0 40px rgba(123, 47, 247, 0.1);
}

[data-theme="light"] .project-title {
    color: #1e293b;
}

[data-theme="light"] .project-card p {
    color: #64748b;
}

[data-theme="light"] .tech-tag {
    background: rgba(241, 245, 249, 1);
    color: #64748b;
    border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .tech-tag:hover {
    background: rgba(123, 47, 247, 0.1);
    color: var(--primary-purple);
    border-color: rgba(123, 47, 247, 0.3);
}

[data-theme="light"] .project-link {
    color: #64748b;
}

[data-theme="light"] .project-link:hover {
    color: var(--primary-purple);
}

[data-theme="light"] .contact {
    background: rgba(248, 250, 252, 0.95);
}

[data-theme="light"] .contact-item {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .contact-item:hover {
    border-color: var(--primary-purple);
    box-shadow: 0 8px 30px rgba(123, 47, 247, 0.12);
}

[data-theme="light"] .contact-item h4 {
    color: #1e293b;
}

[data-theme="light"] .contact-item p,
[data-theme="light"] .contact-item p a {
    color: #64748b;
}

[data-theme="light"] .contact-item p a:hover {
    color: var(--primary-purple);
}

[data-theme="light"] .contact h3 {
    color: #1e293b;
}

[data-theme="light"] .contact>.container>div:last-child p {
    color: #64748b;
}

[data-theme="light"] .social-link {
    background: #ffffff;
    color: #475569;
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .social-link:hover {
    color: white;
    box-shadow: 0 8px 25px rgba(123, 47, 247, 0.3);
}

[data-theme="light"] .footer {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border-top-color: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .footer::before {
    background: linear-gradient(90deg, var(--primary-purple), var(--primary-pink));
}

[data-theme="light"] .footer-tagline,
[data-theme="light"] .footer-copyright {
    color: #64748b;
}

[data-theme="light"] .footer-links a {
    background: #ffffff;
    color: #475569;
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .footer-links a:hover {
    box-shadow: 0 8px 25px rgba(123, 47, 247, 0.25);
}

[data-theme="light"] .code-accent {
    background: rgba(123, 47, 247, 0.08);
    border-color: rgba(123, 47, 247, 0.2);
    color: var(--primary-purple);
}

[data-theme="light"] .code-accent:hover {
    background: rgba(123, 47, 247, 0.12);
}

[data-theme="light"] .nav-links.active {
    background: rgba(255, 255, 255, 0.98);
    border-top-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] ::-webkit-scrollbar-track {
    background: #f1f5f9;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
    border-color: #f1f5f9;
}

[data-theme="light"] .modal-content {
    background: #ffffff;
    border-color: var(--primary-purple);
}

[data-theme="light"] .back-to-top {
    box-shadow: 0 4px 20px rgba(123, 47, 247, 0.3);
}

[data-theme="light"] .back-to-top:hover {
    box-shadow: 0 8px 30px rgba(123, 47, 247, 0.4);
}

/* ====================================
   Responsive Styles
   ==================================== */

/* Large Tablets */
@media (max-width: 1024px) {

    .about-grid,
    .contact-grid {
        gap: 3rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .certifications-grid,
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Tablets */
@media (max-width: 768px) {
    nav {
        padding: 0.8rem 1rem;
    }

    .nav-container {
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem;
        text-align: center;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        gap: 0;
    }

    .nav-links.active {
        display: flex;
        animation: slide-down 0.3s ease;
    }

    @keyframes slide-down {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-links li {
        margin: 0.8rem 0;
    }

    .nav-links a {
        display: block;
        padding: 0.8rem;
    }

    .nav-cv-btn {
        margin-top: 0.5rem;
    }

    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .hero {
        padding-top: 5rem;
    }

    .hero::before {
        inset: 10px;
    }

    .hero-profile-photo {
        width: 160px;
        height: 190px;
    }

    .profile-photo {
        width: 180px;
        height: 210px;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .certifications-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-image-wrapper {
        height: 200px;
    }

    .scroll-indicator {
        display: none;
    }

    section {
        padding: 4rem 1rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    nav {
        padding: 0.6rem 0.8rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .mobile-menu-btn {
        font-size: 1.3rem;
    }

    .hero-profile-photo {
        width: 140px;
        height: 165px;
    }

    .profile-photo {
        width: 150px;
        height: 175px;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 0.9rem 1.5rem;
    }

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

    .stat-item {
        padding: 1.5rem 1rem;
    }

    .skill-category {
        min-height: auto;
        padding: 1.5rem;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

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

    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 1.5rem;
        right: 1.5rem;
    }

    .modal-content {
        width: 95%;
        padding: 0.5rem;
    }

    .modal-close {
        top: -10px;
        right: -10px;
        width: 35px;
        height: 35px;
    }

    section {
        padding: 3rem 0.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 0.95rem;
        padding: 0 0.5rem;
    }
}

/* ====================================
   Certificate Modal
   ==================================== */
.cert-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.cert-modal.active {
    opacity: 1;
    visibility: visible;
}

.cert-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.cert-modal-content {
    position: relative;
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    background: linear-gradient(145deg, rgba(20, 20, 30, 0.95), rgba(10, 10, 20, 0.98));
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 25px 80px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(0, 212, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    overflow: hidden;
    transform: scale(0.8) translateY(30px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.cert-modal.active .cert-modal-content {
    transform: scale(1) translateY(0);
}

.cert-modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    z-index: 10;
}

.cert-modal-close:hover {
    background: rgba(241, 7, 163, 0.3);
    border-color: var(--primary-pink);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 20px rgba(241, 7, 163, 0.4);
}

.cert-modal-title {
    padding: 1.5rem 2rem;
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.cert-modal-image-wrapper {
    position: relative;
    max-height: 65vh;
    min-height: 300px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(0, 0, 0, 0.4), rgba(10, 10, 30, 0.5));
    padding: 1.5rem;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
}

.cert-modal-image-wrapper.dragging {
    cursor: grabbing;
}

.cert-modal-image-wrapper.zoomed {
    overflow: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-blue) transparent;
}

.cert-modal-image-wrapper.zoomed::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.cert-modal-image-wrapper.zoomed::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.cert-modal-image-wrapper.zoomed::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 10px;
}

.cert-modal-image {
    max-width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow:
        0 15px 50px rgba(0, 0, 0, 0.5),
        0 0 30px rgba(0, 212, 255, 0.1);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.3s ease;
    cursor: zoom-in;
    transform-origin: center center;
    will-change: transform;
}

/* Zoom Levels */
.cert-modal-image.zoom-1x {
    transform: scale(1);
    cursor: zoom-in;
}

.cert-modal-image.zoom-2x {
    transform: scale(2);
    cursor: move;
}

.cert-modal-image.zoom-3x {
    transform: scale(3);
    cursor: move;
}

.cert-modal-image.zoom-4x {
    transform: scale(4);
    cursor: zoom-out;
}

/* Legacy zoomed class for fallback */
.cert-modal-image.zoomed {
    transform: scale(2);
    cursor: move;
}

/* Zoom indicator badge */
.cert-zoom-indicator {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 5;
}

.cert-modal-image-wrapper:hover .cert-zoom-indicator,
.cert-modal-image-wrapper.zoomed .cert-zoom-indicator {
    opacity: 1;
}

.cert-zoom-indicator i {
    color: var(--primary-blue);
}

.cert-modal-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
}

.cert-loader {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: cert-spin 1s linear infinite;
}

@keyframes cert-spin {
    to {
        transform: rotate(360deg);
    }
}

.cert-modal-loading.hidden {
    display: none;
}

.cert-modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cert-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.cert-action-btn:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.3);
}

.cert-action-btn i {
    font-size: 1rem;
}

/* Zoom controls group */
.cert-zoom-controls {
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-full);
    padding: 0.25rem;
}

.cert-zoom-controls .cert-action-btn {
    padding: 0.6rem 1rem;
    min-width: auto;
}

.cert-zoom-controls .cert-action-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
}

.zoom-level-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
    padding: 0.6rem 0.8rem;
    background: rgba(0, 212, 255, 0.15);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-blue);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Fira Code', monospace;
}

/* Certificate card button style */
.certification-card .cert-link {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(123, 47, 247, 0.2));
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--primary-blue);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: 1rem;
}

.certification-card .cert-link:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

/* Certificate Modal Responsive */
@media (max-width: 768px) {
    .cert-modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .cert-modal-title {
        font-size: 1.1rem;
        padding: 1rem 1.5rem;
        padding-right: 3rem;
    }

    .cert-modal-close {
        width: 38px;
        height: 38px;
        top: 10px;
        right: 10px;
    }

    .cert-modal-image {
        max-height: 50vh;
    }

    .cert-modal-actions {
        flex-wrap: wrap;
        padding: 1rem;
    }

    .cert-action-btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
        padding: 0.65rem 1rem;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .animated-bg {
        animation: none;
        background-position: 0% 50%;
    }
}

/* Print Styles */
@media print {

    .animated-bg,
    .particles-container,
    .scroll-progress,
    nav,
    .scroll-indicator,
    .back-to-top,
    .floating-shapes {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    section {
        break-inside: avoid;
        padding: 1rem;
    }
}