/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --bg-dark:    #0a0e1a;
    --bg-mid:     #0d1225;
    --bg-card:    #0f1629;
    --accent:     #00d4aa;
    --accent-dim: rgba(0, 212, 170, 0.12);
    --accent-glow:rgba(0, 212, 170, 0.28);
    --accent2:    #ff2d6a;
    --text:       #e6edf3;
    --text-muted: #8b9ab8;
    --text-dim:   #4f617a;
    --border:     rgba(0, 212, 170, 0.15);
    --mono:       'Space Mono', 'Courier New', monospace;
    --sans:       'Inter', -apple-system, sans-serif;
    --nav-h:      70px;
    --max-w:      1100px;
    --ease:       all 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

/* Subtle radial glow background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 85% 5%,  rgba(88, 28, 135, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 5%  90%, rgba(0,  90, 160, 0.14) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Scrollbar */
::-webkit-scrollbar       { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ============================================
   Shared Utilities
   ============================================ */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

#about, #projects, #contact { background: var(--bg-mid); }
#skills, #education, #hero   { background: transparent; }

.section-title {
    font-family: var(--mono);
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--text);
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 20px;
    white-space: nowrap;
}

.section-title::after {
    content: '';
    display: block;
    height: 1px;
    flex: 1;
    max-width: 320px;
    background: var(--border);
}

.hl          { color: var(--accent); }
.accent-gt   { color: var(--accent); margin-right: 6px; }
.accent-text { color: var(--accent); }
.incomplete  { color: var(--text-dim); font-size: 0.85em; }

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Header / Navbar
   ============================================ */
#header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 999;
    transition: var(--ease);
}

#header.scrolled {
    background: rgba(10, 14, 26, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 24px rgba(0,0,0,0.4);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-h);
    padding: 0 40px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Logo */
.logo {
    font-family: var(--mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 1px;
    transition: var(--ease);
}
.logo:hover { text-shadow: 0 0 12px var(--accent-glow); }

/* Nav links */
.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-family: var(--mono);
    font-size: 0.82rem;
    color: var(--text-muted);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 1px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active        { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Resume button */
.btn-resume {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 1px;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 8px 18px;
    border-radius: 4px;
    text-decoration: none;
    transition: var(--ease);
}
.btn-resume:hover {
    background: var(--accent-dim);
    box-shadow: 0 0 16px var(--accent-glow);
}

/* Language toggle */
.lang-toggle {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: var(--mono);
    font-size: 0.75rem;
    padding: 4px;
}
.lang-opt {
    color: var(--text-dim);
    transition: color 0.2s ease;
    padding: 2px 4px;
}
.lang-opt.active { color: var(--accent); }
.lang-sep        { color: var(--text-dim); }

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    display: block;
    width: 24px; height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: var(--ease);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.mobile-menu {
    display: none;
    background: rgba(10, 14, 26, 0.97);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding: 20px 40px 30px;
}
.mobile-menu.open { display: block; }
.mobile-menu ul   { list-style: none; display: flex; flex-direction: column; gap: 18px; }

.mobile-link {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}
.mobile-link:hover, .accent-link { color: var(--accent); }

/* ============================================
   Hero
   ============================================ */
#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--nav-h) 30px 0;
}

.hero-content { max-width: 780px; }

.hero-greeting {
    font-family: var(--mono);
    font-size: 1rem;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.hero-name {
    font-family: var(--mono);
    font-size: clamp(2.8rem, 8vw, 5.2rem);
    font-weight: 700;
    color: var(--text);
    line-height: 1.1;
    margin-bottom: 14px;
}

.hero-tagline {
    font-family: var(--mono);
    font-size: clamp(1.1rem, 3.5vw, 1.9rem);
    color: var(--accent2);
    font-weight: 400;
    margin-bottom: 28px;
    min-height: 2.2rem;
}

.cursor {
    color: var(--accent);
    animation: blink 0.75s step-end infinite;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

.hero-bio {
    font-size: 0.97rem;
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto 40px;
    line-height: 1.85;
}

.hero-socials {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.social-link {
    color: var(--text-muted);
    font-size: 1.45rem;
    transition: var(--ease);
}
.social-link:hover {
    color: var(--accent);
    transform: translateY(-4px);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
}
.mouse {
    width: 22px; height: 36px;
    border: 2px solid var(--text-dim);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}
.wheel {
    width: 4px; height: 7px;
    background: var(--accent);
    border-radius: 2px;
    animation: scroll-wheel 1.6s ease infinite;
}
@keyframes scroll-wheel {
    0%   { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(14px); }
}

/* ============================================
   About
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-muted);
    font-size: 0.97rem;
    line-height: 1.9;
    margin-bottom: 20px;
}
.about-text p:last-child { margin-bottom: 0; }

.about-photo {
    margin-bottom: 20px;
}

.about-photo img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: block;
    filter: grayscale(20%);
    transition: filter 0.4s ease;
}

.about-photo img:hover {
    filter: grayscale(0%);
}

.about-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.about-pill {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.about-pill i { color: var(--accent); font-size: 0.7rem; }

.about-pill-status {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

.about-pill-status::before {
    content: '';
    width: 7px; height: 7px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    animation: pulse-dot 1.8s ease infinite;
}

@keyframes pulse-dot {
    0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
    70%  { box-shadow: 0 0 0 7px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
}

/* ============================================
   Skills
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 44px;
}

.skill-group-title {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 4px;
    cursor: default;
    transition: var(--ease);
}
.skill-tag:hover {
    background: rgba(0, 212, 170, 0.22);
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

/* ============================================
   Projects
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Invisible overlay that makes the whole card navigate to the project page */
.card-main-link {
    position: absolute;
    inset: 0;
    z-index: 0;
    border-radius: 8px;
}

/* Keep the GitHub icon clickable above the overlay */
.card-links {
    position: relative;
    z-index: 1;
}
.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 12px 32px rgba(0, 212, 170, 0.1);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-icon {
    font-size: 1.9rem;
    color: var(--accent);
}

.card-links {
    display: flex;
    gap: 16px;
}
.card-links a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: color 0.3s ease;
}
.card-links a:hover { color: var(--accent); }

.card-title {
    font-family: var(--mono);
    font-size: 1.15rem;
    color: var(--text);
    transition: color 0.3s ease;
}
.project-card:hover .card-title { color: var(--accent); }

.card-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.8;
    flex: 1;
}

.card-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 4px;
}
.card-stack span {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-muted);
}
.card-stack span::before {
    content: '#';
    color: var(--accent);
    margin-right: 1px;
}

/* ============================================
   Education / Timeline
   ============================================ */
.timeline {
    position: relative;
    padding-left: 28px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0; top: 8px; bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent) 0%, transparent 100%);
}

.timeline-item {
    position: relative;
    padding-left: 30px;
    margin-bottom: 48px;
}
.timeline-item:last-child { margin-bottom: 0; }

.tl-dot {
    position: absolute;
    left: -33px; top: 9px;
    width: 10px; height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-glow);
}

.tl-date {
    display: block;
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--accent);
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.tl-title {
    font-size: 1.05rem;
    color: var(--text);
    margin-bottom: 4px;
    font-weight: 600;
}

.tl-school {
    font-family: var(--mono);
    font-size: 0.80rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-bottom: 8px;
}

.tl-detail {
    font-size: 0.86rem;
    color: var(--text-dim);
}

/* ============================================
   Contact
   ============================================ */
#contact { text-align: center; }

.contact-wrapper {
    max-width: 580px;
    margin: 0 auto;
}

.contact-blurb {
    font-size: 0.97rem;
    color: var(--text-muted);
    line-height: 1.85;
    margin-bottom: 40px;
}

.btn-contact {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 0.88rem;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 14px 32px;
    border-radius: 4px;
    text-decoration: none;
    transition: var(--ease);
    margin-bottom: 64px;
}
.btn-contact:hover {
    background: var(--accent-dim);
    box-shadow: 0 0 22px var(--accent-glow);
    transform: translateY(-2px);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.contact-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--mono);
    font-size: 0.76rem;
    transition: var(--ease);
}
.contact-link i           { font-size: 1.4rem; }
.contact-link:hover       { color: var(--accent); transform: translateY(-4px); }
button.contact-link       { background: none; border: none; cursor: pointer; }
.contact-link.copied      { color: var(--accent); }
.contact-link.copied i    { content: '\f00c'; }

/* ============================================
   Footer
   ============================================ */
footer {
    background: var(--bg-dark);
    text-align: center;
    padding: 24px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
    .about-grid   { grid-template-columns: 1fr; }
    .skills-grid  { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links, .btn-resume { display: none; }
    .hamburger              { display: flex; }

    .container { padding: 0 24px; }
    .navbar    { padding: 0 24px; }

    section { padding: 80px 0; }

    .section-title { font-size: 1.35rem; }
    .section-title::after { max-width: 120px; }

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

    .contact-links { gap: 28px; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2.4rem; }
    .container { padding: 0 18px; }
    .contact-links { gap: 20px; }
}