/* ==========================================
   CSS RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Vibrant Dark Theme */
    --bg-primary: hsl(230, 25%, 8%);
    --bg-secondary: hsl(230, 20%, 12%);
    --bg-tertiary: hsl(230, 18%, 16%);
    
    --accent-primary: hsl(260, 85%, 65%);
    --accent-secondary: hsl(200, 90%, 55%);
    --accent-gradient: linear-gradient(135deg, hsl(260, 85%, 65%), hsl(200, 90%, 55%));
    --accent-gradient-hover: linear-gradient(135deg, hsl(260, 90%, 70%), hsl(200, 95%, 60%));
    
    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-muted: hsl(0, 0%, 50%);
    
    /* Glassmorphism */
    --glass-bg: hsla(230, 20%, 15%, 0.7);
    --glass-border: hsla(0, 0%, 100%, 0.1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px hsla(0, 0%, 0%, 0.2);
    --shadow-md: 0 4px 16px hsla(0, 0%, 0%, 0.3);
    --shadow-lg: 0 8px 32px hsla(0, 0%, 0%, 0.4);
    --shadow-glow: 0 0 30px hsla(260, 85%, 65%, 0.3);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==========================================
   NAVIGATION
   ========================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

header.scrolled {
    background: hsla(230, 25%, 8%, 0.95);
    box-shadow: var(--shadow-md);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    transition: transform var(--transition-fast);
}

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

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

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-fast);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

nav a:hover {
    color: var(--text-primary);
}

nav a:hover::after {
    width: 100%;
}

/* ==========================================
   HERO SECTION
   ========================================== */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0 2rem;
    margin-top: 0;
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, hsla(260, 85%, 65%, 0.15), transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

#hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, hsla(200, 90%, 55%, 0.12), transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
    letter-spacing: -2px;
}

.hero-content h1 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
}

.hero-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent-gradient);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.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: left 0.5s;
}

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

.btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0 40px hsla(260, 85%, 65%, 0.5);
}

.btn:active {
    transform: translateY(0) scale(1);
}

/* ==========================================
   SECTIONS
   ========================================== */
section {
    padding: var(--spacing-xl) 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
#about {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: var(--spacing-lg) var(--spacing-md);
    margin: var(--spacing-lg) auto;
    box-shadow: var(--shadow-lg);
}

#about p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.9;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* ==========================================
   SKILLS SECTION
   ========================================== */
.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    list-style: none;
    margin-top: var(--spacing-md);
}

.skills-list li {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    border-radius: 16px;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.skills-list li::before {
    content: '✦';
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    transition: all var(--transition-normal);
}

.skills-list li:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    background: var(--bg-tertiary);
}

.skills-list li:hover::before {
    opacity: 1;
    transform: rotate(180deg) scale(1.2);
}

/* ==========================================
   PROJECTS SECTION
   ========================================== */
.project-list {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.project {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, hsla(260, 85%, 65%, 0.1), transparent);
    transition: left 0.6s;
}

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

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

.project h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.project a {
    color: var(--accent-secondary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.project a::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.project a:hover {
    color: var(--accent-primary);
}

.project a:hover::after {
    transform: translateX(5px);
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
#contact {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: var(--spacing-lg) var(--spacing-md);
    margin: var(--spacing-lg) auto;
    box-shadow: var(--shadow-lg);
}

.contact-details {
    max-width: 600px;
    margin: 0 auto;
}

.contact-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--spacing-md);
    text-align: center;
}

.contact-card p {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.contact-card a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-card a:hover {
    color: var(--accent-primary);
}

.socials {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.social-btn {
    padding: 0.75rem 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: inline-block;
}

.social-btn:hover {
    background: var(--accent-gradient);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    text-align: center;
    padding: var(--spacing-md);
    color: var(--text-muted);
    border-top: 1px solid var(--glass-border);
    margin-top: var(--spacing-xl);
}

footer p {
    font-size: 0.95rem;
}

/* ==========================================
   ANIMATIONS & UTILITIES
   ========================================== */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
    
    section {
        padding: var(--spacing-md) 1.5rem;
    }
    
    .skills-list {
        grid-template-columns: 1fr;
    }
    
    .socials {
        flex-direction: column;
    }
    
    #hero {
        padding: 0 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.875rem 2rem;
        font-size: 0.95rem;
    }
    
    section h2 {
        font-size: 1.75rem;
    }
}

/* ==========================================
   SCROLL ANIMATIONS
   ========================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}