/* Premium Designer-Grade Style Sheet (Serif-Editorial Dark Theme) */
:root {
    --bg-main: #0a0b10; /* Pure deep slate black */
    --bg-card: #0f111a; /* Dark card background */
    --bg-pill: #151824; /* Tag background */
    --border-color: #1a1e2b; /* Crisp dark border */
    --border-hover: #2b3247;
    --accent: #3b82f6; /* Classic Royal Blue */
    --accent-glow: rgba(59, 130, 246, 0.03); /* Soft ambient backlight */
    --text-primary: #f3f4f6; /* Gray 100 */
    --text-secondary: #9ca3af; /* Gray 400 */
    --text-muted: #6b7280; /* Gray 500 */
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --max-width: 960px;
    --border-radius: 8px;
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    padding-top: 70px;
    position: relative;
    overflow-x: hidden;
}

/* Soft ambient background gradient glow (not neon, very elegant) */
body::before {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(10, 11, 16, 0.7);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 8%;
    z-index: 100;
}

.logo {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    margin-left: 2rem;
    position: relative;
    padding-bottom: 4px;
    transition: var(--transition);
}

.nav-links a::after {
    content: "";
    position: absolute;
    width: 0;
    height: 1.5px;
    bottom: 0;
    left: 50%;
    background-color: var(--accent);
    transition: width 0.25s ease-in-out, left 0.25s ease-in-out;
}

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

.nav-links a:hover::after {
    width: 100%;
    left: 0;
}

/* Typography styles */
.serif-title {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 600;
    color: #ffffff;
}

/* Hero Section */
.hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    padding: 6rem 0;
}

.hero-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 4rem;
    width: 100%;
}

.hero-content {
    max-width: 620px;
}


.hero h1 {
    font-size: 3.75rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
}

.hero .subtitle {
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.hero .description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.tagline {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.05rem;
    color: var(--text-secondary);
    border-left: 2px solid var(--border-color);
    padding-left: 1rem;
    margin-bottom: 3rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* Hero Graphic (Technical Line Art) */
.hero-graphic {
    flex-shrink: 0;
}

.hero-graphic svg {
    animation: rotate-slow 40s linear infinite;
}

@keyframes rotate-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Button UI (Sharp & Clean) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.6rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-main);
    border: 1px solid var(--text-primary);
}

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

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

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

/* Section styling */
.section {
    padding: 7rem 0;
    border-top: 1px solid var(--border-color);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 3.5rem;
}

/* Grid systems */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Project Cards (High fidelity) */
.project-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    min-height: 380px;
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.project-year {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}

.project-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.75rem;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.project-stack span {
    font-family: monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--bg-pill);
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.5rem;
    border-radius: 2px;
}

/* Project Clean Link */
.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    transition: var(--transition);
}

.project-link i {
    font-size: 0.8rem;
    transition: transform 0.2s ease-in-out;
}

.project-card:hover .project-link {
    color: var(--accent);
}

.project-card:hover .project-link i {
    transform: translateX(4px);
}

/* Skill block design */
.skill-block {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
}

.skill-block h3 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.skill-block p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.tech-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-pills span {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background-color: var(--bg-pill);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    transition: var(--transition);
}

.tech-pills span:hover {
    border-color: var(--accent);
    color: #ffffff;
}

/* Contact Section (High Polish) */
.contact-section {
    text-align: center;
    border-bottom: none;
}

.contact-card h2 {
    font-size: 2.2rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 550px;
    margin: 0 auto 2.5rem auto;
}

.contact-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.contact-btn:hover {
    border-color: var(--accent);
    background-color: var(--bg-pill);
}

/* Footer layout */
footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.src-code-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.src-code-link:hover {
    color: var(--text-primary);
}

/* Mobile responsive fixes */
@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
    .navbar {
        height: 60px;
        padding: 0 5%;
    }
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2.75rem;
    }
    .hero .subtitle {
        font-size: 1.15rem;
    }
    .hero-flex {
        flex-direction: column;
        gap: 2rem;
    }
    .hero-graphic {
        display: none;
    }
    .hero-actions {
        flex-direction: column;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
    .project-card {
        min-height: auto;
    }
    .skill-block {
        padding: 1.75rem;
    }
    .footer-wrap {
        flex-direction: column;
        gap: 0.75rem;
    }
}