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

:root {
    --bg: #0a0a0f;
    --bg-subtle: #12121a;
    --text: #e4e4e7;
    --text-muted: #8b8b9e;
    --accent: #7c6aef;
    --accent-hover: #9b8afb;
    --accent-glow: rgba(124, 106, 239, 0.15);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(124, 106, 239, 0.3);
    --tag-bg: rgba(255, 255, 255, 0.06);
    --radius: 14px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* === Shooting Stars Canvas === */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* All content above the canvas */
nav, main, footer {
    position: relative;
    z-index: 1;
}

/* === Nav === */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

/* === Hero === */
.hero {
    max-width: 960px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
}

.hero-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #e4e4e7 0%, #7c6aef 50%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 540px;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s, box-shadow 0.2s;
}

.btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 20px var(--accent-glow);
}

/* === Sections === */
section {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text);
}

/* === Project Grid === */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    text-decoration: none;
    color: var(--text);
    transition: box-shadow 0.3s, transform 0.2s, border-color 0.3s;
    backdrop-filter: blur(8px);
}

.project-card:hover {
    box-shadow: 0 4px 30px rgba(124, 106, 239, 0.1);
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
}

.project-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.75rem;
}

.project-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    background: var(--tag-bg);
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

/* === Skills Grid === */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.skill-group {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    backdrop-filter: blur(8px);
}

.skill-group h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

/* === Experience Timeline === */
.timeline {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid var(--card-border);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
    padding-left: 1.25rem;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -1.6rem;
    top: 0.35rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg);
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.timeline-company {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.timeline-content p:last-child {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* === About === */
.about p {
    color: var(--text-muted);
    max-width: 600px;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.about-education {
    font-size: 0.9rem;
    line-height: 1.8;
}

/* === Contact === */
.contact {
    text-align: center;
    padding-bottom: 6rem;
}

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

.contact-email {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 1.5rem;
    user-select: all;
    cursor: text;
}

.contact-links {
    margin-top: 1rem;
}

.contact-links a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.link-sep {
    color: var(--text-muted);
    margin: 0 0.4rem;
}

/* === Project Detail === */
.project-detail {
    padding-top: 3rem;
}

.back-link {
    display: inline-block;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.back-link:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.project-icon-lg {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.project-detail h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.project-tagline {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.25rem;
}

.project-body {
    margin-top: 2.5rem;
}

.project-body h2 {
    font-size: 1.2rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.project-body p {
    color: var(--text-muted);
    max-width: 640px;
}

.project-body ul {
    list-style: none;
    padding: 0;
}

.project-body li {
    padding: 0.4rem 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.project-body li::before {
    content: "→ ";
    color: var(--accent);
    font-weight: 600;
}

/* === Footer === */
footer {
    margin-top: auto;
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* === Responsive === */
@media (max-width: 640px) {
    .hero h1 {
        font-size: 1.85rem;
    }

    nav {
        padding: 1rem;
    }

    section {
        padding: 3rem 1.25rem;
    }

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