:root {
    /* Premium Color Palette - Elegant Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-tertiary: #1a1a24;

    /* Sophisticated Accent Colors */
    --accent-primary: #3b82f6;
    /* Professional Blue */
    --accent-secondary: #06b6d4;
    /* Vibrant Cyan */
    --accent-tertiary: #8b5cf6;
    /* Rich Purple */
    --accent-gold: #f59e0b;
    /* Warm Gold */

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Card & Surface Colors */
    --card-bg: rgba(26, 26, 36, 0.6);
    --card-border: rgba(59, 130, 246, 0.1);
    --card-hover-border: rgba(59, 130, 246, 0.4);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-card: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.7);
    --glow-blue: 0 0 40px rgba(59, 130, 246, 0.3);
    --glow-purple: 0 0 40px rgba(139, 92, 246, 0.3);

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 200ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

/* ================= RESET & BASE ================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Elegant Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
}

/* Subtle Grid Pattern */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
    opacity: 0.5;
}

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

/* ================= HERO SECTION ================= */

.hero {
    min-height: 100vh;
    padding: 80px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 32px;
    border: 3px solid transparent;
    background: var(--gradient-primary);
    background-clip: padding-box;
    padding: 5px;
    box-shadow: var(--shadow-lg), var(--glow-blue);
    transition: all var(--duration-normal) var(--ease);
    animation: float 6s ease-in-out infinite;
    position: relative;
}

.avatar::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: var(--gradient-primary);
    z-index: -1;
    opacity: 0.5;
    filter: blur(20px);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-15px);
    }
}

.avatar:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(59, 130, 246, 0.6);
    animation-play-state: paused;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s var(--ease);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.subtitle {
    color: var(--text-secondary);
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    margin-bottom: 40px;
    font-weight: 500;
    animation: fadeInUp 0.8s var(--ease) 0.2s backwards;
}

.hero-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeInUp 0.8s var(--ease) 0.4s backwards;
}

/* ================= BUTTONS ================= */

.btn {
    padding: 16px 36px;
    border-radius: 14px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease);
    position: relative;
    overflow: hidden;
    border: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width var(--duration-slow) var(--ease),
        height var(--duration-slow) var(--ease);
}

.btn:hover::before {
    width: 400px;
    height: 400px;
}

.btn.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6);
}

.btn.outline {
    background: rgba(59, 130, 246, 0.05);
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    backdrop-filter: blur(10px);
}

.btn.outline:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

/* ================= SECTIONS ================= */

section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
}

h2 {
    text-align: center;
    font-size: clamp(2.2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

h2::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 24px auto 0;
    border-radius: 10px;
}

/* ================= ABOUT SECTION ================= */

.about p {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
    font-size: clamp(1.05rem, 2.5vw, 1.2rem);
    line-height: 1.8;
    font-weight: 400;
}

/* ================= SKILLS SECTION ================= */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.skills-grid div {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 36px 28px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
    transition: all var(--duration-normal) var(--ease);
    position: relative;
    overflow: hidden;
}

.skills-grid div::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease);
}

.skills-grid div:hover {
    transform: translateY(-8px);
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-lg), var(--glow-blue);
}

.skills-grid div:hover::before {
    opacity: 1;
}

.skills-grid h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 12px;
    position: relative;
}

.skills-grid p {
    color: var(--text-muted);
    font-size: 1rem;
    position: relative;
    font-weight: 500;
}

/* ================= PROJECTS SECTION ================= */

.project-grid {
    display: grid;
    gap: 32px;
    margin-top: 60px;
}

@media (min-width: 768px) {
    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-card.highlight {
        grid-column: span 2;
    }
}

.project-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 36px;
    border-radius: 24px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
    transition: all var(--duration-normal) var(--ease);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-xl), var(--glow-blue);
}

.project-card:hover::before {
    opacity: 1;
}

.project-card.highlight {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.project-card.highlight:hover {
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: var(--shadow-xl), 0 0 50px rgba(59, 130, 246, 0.3);
}

.project-card h3 {
    font-size: clamp(1.3rem, 3vw, 1.6rem);
    font-weight: 700;
    margin-bottom: 14px;
    position: relative;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.7;
    position: relative;
}

.project-points {
    list-style: none;
    padding: 0;
    margin-bottom: 28px;
    position: relative;
}

.project-points li {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    padding-left: 28px;
    margin-bottom: 14px;
    position: relative;
}

.project-points li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-size: 1.3rem;
    line-height: 1.6;
    font-weight: bold;
}

.project-card .tech {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: 24px;
    position: relative;
    padding: 8px 16px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.project-links {
    margin-top: auto;
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    position: relative;
}

.project-links a {
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent-primary);
    border: 1px solid var(--card-border);
    background: rgba(59, 130, 246, 0.08);
    transition: all var(--duration-fast) var(--ease);
}

.project-links a:hover {
    transform: translateY(-2px);
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

/* ================= CONTACT SECTION ================= */

.contact-card {
    max-width: 700px;
    margin: 60px auto 0;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 50px 40px;
    border-radius: 24px;
    text-align: center;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    opacity: 0.6;
}

.contact-card strong {
    font-size: 1.4rem;
    position: relative;
    display: block;
    margin-bottom: 28px;
    font-weight: 700;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    position: relative;
}

.contact-links a {
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent-secondary);
    border: 1px solid var(--card-border);
    background: rgba(6, 182, 212, 0.08);
    transition: all var(--duration-fast) var(--ease);
}

.contact-links a:hover {
    transform: translateY(-3px);
    background: var(--accent-secondary);
    color: white;
    border-color: var(--accent-secondary);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

/* ================= RESPONSIVE DESIGN ================= */

@media (max-width: 767px) {
    section {
        padding: 70px 20px;
    }

    .hero {
        padding: 60px 20px;
    }

    .avatar {
        width: 150px;
        height: 150px;
    }

    .hero-actions {
        gap: 14px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 0.95rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .project-card {
        padding: 28px;
    }

    .contact-card {
        padding: 36px 28px;
    }
}

@media (max-width: 480px) {
    .project-points li {
        font-size: 0.9rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
    }

    .btn {
        width: 100%;
    }
}

/* ================= ACCESSIBILITY ================= */

@media (prefers-reduced-motion: reduce) {

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

/* ================= PERFORMANCE ================= */

.btn,
.avatar,
.skills-grid div,
.project-card,
.project-links a,
.contact-links a {
    will-change: transform;
}