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

:root {
    --color-bg: #0a0a0b;
    --color-bg-alt: #111113;
    --color-surface: #1a1a1d;
    --color-border: #2a2a2e;
    --color-text: #e4e4e7;
    --color-text-muted: #a1a1aa;
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-accent: #22c55e;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --max-width: 1100px;
    --radius: 8px;
    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

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

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; margin-bottom: 2rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; color: var(--color-text-muted); }

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--color-text);
}

.nav-logo:hover {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    text-align: center;
}

.hero h1 {
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.hero-description {
    max-width: 600px;
    margin: 0 auto 2rem;
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.hero-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: white;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
    color: var(--color-text);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

/* About Section */
.about-content {
    max-width: 700px;
}

.about-content p {
    margin-bottom: 1.25rem;
    color: var(--color-text-muted);
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
    display: block;
    color: var(--color-text);
}

.project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    color: var(--color-text);
}

.project-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.project-card h3 {
    margin-bottom: 0.25rem;
}

.project-tech {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.project-card p:last-child {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* Experience Section */
.experience-list {
    max-width: 800px;
}

.experience-item {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--color-border);
}

.experience-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.experience-header {
    margin-bottom: 1rem;
}

.experience-header h3 {
    margin-bottom: 0.25rem;
}

.experience-company {
    color: var(--color-primary);
    font-weight: 500;
}

.experience-company a {
    color: var(--color-primary);
}

.experience-date {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.experience-details {
    list-style: none;
    padding-left: 1rem;
}

.experience-details li {
    position: relative;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    padding-left: 1rem;
}

.experience-details li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

/* Skills Section */
.skills-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.skills-section h3 {
    margin-bottom: 1.5rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.skill-category h4 {
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

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

/* Contact Section */
.contact-intro {
    color: var(--color-text-muted);
    max-width: 500px;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-links a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text);
    font-weight: 500;
    padding: 1rem 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

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

.contact-links svg {
    opacity: 0.8;
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.5rem; }

    .hero {
        padding: 8rem 0 4rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

    .nav-links {
        display: none;
    }

    .section {
        padding: 3rem 0;
    }

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

    .contact-links {
        flex-direction: column;
    }

    .contact-links a {
        justify-content: center;
    }
}

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}