/* ===================================
   CSS VARIABLES - Easy to customize!
   Change these values to update the entire site's look
   =================================== */
:root {
    /* Color Palette */
    --bg-primary: #0a0a0a;           /* Main background - deep black */
    --bg-secondary: #141414;         /* Secondary backgrounds */
    --bg-tertiary: #1a1a1a;         /* Card backgrounds */
    
    --text-primary: #ffffff;         /* Main text color */
    --text-secondary: #a0a0a0;       /* Muted text */
    --text-tertiary: #707070;        /* Even more muted */
    
    --accent-primary: #00ffaa;       /* Main accent - cyan/green */
    --accent-secondary: #0099ff;     /* Secondary accent - blue */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    /* Typography - Using distinctive fonts */
    --font-display: 'Syne', sans-serif;        /* For headings */
    --font-body: 'DM Sans', sans-serif;        /* For body text */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===================================
   NAVIGATION BAR
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
    padding: 1.5rem 0;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
}

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

/* Animated underline on hover */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

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

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

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: calc(var(--spacing-lg) + 80px) 2rem var(--spacing-lg) 2rem;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    z-index: 2;
    animation: fadeInUp 1s ease;
}

.hero-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Button Styles */
.btn-primary,
.btn-secondary {
    padding: 1rem 2.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    display: inline-block;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 255, 170, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 255, 170, 0.05);
}

/* Hero Decorative Elements */
.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

.floating-accent {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: float 8s ease-in-out infinite;
}

.accent-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: 10%;
    right: 10%;
}

.accent-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-secondary);
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

/* ===================================
   SECTION SHARED STYLES
   =================================== */
section {
    padding: var(--spacing-xl) 2rem;
}

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

.section-header {
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.section-number {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-primary);
    opacity: 0.6;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
}

.about-intro {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.about-details {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.highlight-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.highlight-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
}

.highlight-icon {
    font-size: 2rem;
    line-height: 1;
}

.highlight-text h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.highlight-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===================================
   PROJECTS SECTION
   =================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 255, 170, 0.1);
}

.project-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.tag {
    background: rgba(0, 255, 170, 0.1);
    color: var(--accent-primary);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.project-footer {
    margin-top: auto;
}

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

.project-link:hover {
    gap: 1rem;
}

/* ===================================
   SKILLS SECTION
   =================================== */
.skills {
    background: var(--bg-secondary);
}

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

.skill-category {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--accent-primary);
}

.skill-category-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-item {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.skill-item:hover {
    background: rgba(0, 255, 170, 0.1);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact-content {
    max-width: 800px;
}

.contact-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

/* Contact Form Styles */
.contact-form-wrapper {
    grid-column: 1 / -1;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg) auto;
}

.contact-form {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(0, 255, 170, 0.05);
}

.form-group textarea {
    resize: vertical;
    min-height: 200px;
}

.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 255, 170, 0.3);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(0, 255, 170, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.form-status.error {
    display: block;
    background: rgba(255, 77, 77, 0.1);
    color: #ff4d4d;
    border: 1px solid #ff4d4d;
}

.contact-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 255, 170, 0.1);
}

.contact-icon {
    font-size: 2rem;
    line-height: 1;
}

.contact-details h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

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

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-tertiary);
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.footer-note {
    font-style: italic;
    font-size: 0.9rem;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-30px) scale(1.05);
    }
}

/* ===================================
   RESPONSIVE DESIGN
   Mobile-first approach
   =================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-links a {
        font-size: 0.9rem;
    }
    
    .hero {
        padding-top: calc(var(--spacing-xl) + 60px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .projects-grid,
    .skills-grid,
    .contact-methods {
        grid-template-columns: 1fr;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .nav-content {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    section {
        padding: var(--spacing-lg) 1rem;
    }
}