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

:root {
    --bg:     #080808;
    --card:   #101010;
    --border: rgba(255,255,255,0.07);
    --text:   #f0f0f0;
    --muted:  rgba(240,240,240,0.38);
    --blue:   #3d5afe;
    --green:  #22c55e;
    --nav-h:  56px;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ===== NAV ===== */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--nav-h);
    background: rgba(8,8,8,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text);
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.8rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.15s;
    font-weight: 500;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.nav-status {
    font-size: 0.72rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.pulse-dot {
    width: 6px; height: 6px;
    background: var(--green);
    border-radius: 50%;
    flex-shrink: 0;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 1px;
    background: var(--muted);
    transition: transform 0.2s, opacity 0.2s;
    transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===== MOBILE MENU ===== */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(8,8,8,0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    padding: 1.25rem 2rem;
    flex-direction: column;
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
    font-size: 0.88rem;
    color: var(--muted);
    text-decoration: none;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    transition: color 0.15s;
}

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--text); }

/* ===== LAYOUT ===== */
main {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
    padding-top: var(--nav-h);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.55rem 1.1rem;
    border-radius: 5px;
    text-decoration: none;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    white-space: nowrap;
}

.btn-main {
    background: var(--blue);
    color: #fff;
    border-color: var(--blue);
}

.btn-main:hover { background: #2c47e8; border-color: #2c47e8; }

.btn-ghost {
    background: transparent;
    color: var(--muted);
    border-color: var(--border);
}

.btn-ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.14); }

/* ===== HERO ===== */
.hero {
    padding: 6rem 0 5rem;
    border-bottom: 1px solid var(--border);
}

.hero-label {
    font-size: 0.72rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.75rem;
    font-weight: 500;
}

.hero h1 {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.hero-desc {
    font-size: 0.93rem;
    color: var(--muted);
    line-height: 1.85;
    max-width: 480px;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

/* ===== SHARED SECTION ===== */
section {
    padding: 4.5rem 0;
    border-bottom: 1px solid var(--border);
}

.section-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--blue);
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.section-title {
    font-size: clamp(1.3rem, 2.2vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 2.5rem;
    line-height: 1.2;
}

/* ===== ABOUT ===== */
.about-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.9;
}

.about-text p + p { margin-top: 0.85rem; }
.about-text strong { color: var(--text); font-weight: 500; }

.about-values {
    display: flex;
    flex-direction: column;
}

.about-value {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.84rem;
    color: var(--muted);
}

.about-value:first-child { border-top: 1px solid var(--border); }
.about-value strong { color: var(--text); font-weight: 500; }

/* ===== PROJECTS ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.proj-card {
    background: var(--card);
    padding: 1.75rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: background 0.15s;
    min-height: 220px;
}

.proj-card.disabled {
    opacity: 0.28;
    pointer-events: none;
}

a.proj-card:hover { background: #141414; }

.proj-tag {
    font-size: 0.65rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.85rem;
    font-weight: 500;
}

.proj-name {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.55rem;
    line-height: 1.25;
}

.proj-desc {
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.75;
    flex: 1;
    margin-bottom: 1.25rem;
}

.proj-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: auto;
}

.proj-pills { display: flex; gap: 0.3rem; flex-wrap: wrap; }

.pill {
    font-size: 0.58rem;
    padding: 0.12rem 0.4rem;
    border-radius: 3px;
    border: 1px solid var(--border);
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.proj-badge {
    font-size: 0.6rem;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 0.12rem 0.45rem;
    border-radius: 3px;
    white-space: nowrap;
}

.proj-arrow {
    font-size: 0.95rem;
    color: var(--muted);
    transition: color 0.15s;
    line-height: 1;
    flex-shrink: 0;
}

a.proj-card:hover .proj-arrow { color: var(--text); }

/* ===== STACK ===== */
.stack-groups {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.stack-group-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 1rem;
}

.tech-list { display: flex; flex-direction: column; }

.tech-item {
    font-size: 0.84rem;
    color: var(--text);
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--border);
}

.tech-item:first-child { border-top: 1px solid var(--border); }
.tech-item.muted { color: var(--muted); }

/* ===== CONTACT ===== */
.contact { border-bottom: none; }

.contact h2 {
    font-size: clamp(1.3rem, 2.2vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 0.85rem;
    line-height: 1.2;
}

.contact-desc {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.8;
    max-width: 400px;
    margin-bottom: 1.75rem;
}

/* ===== FOOTER ===== */
footer {
    max-width: 860px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.72rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

footer a { color: var(--muted); text-decoration: none; transition: color 0.15s; }
footer a:hover { color: var(--text); }
.footer-links { display: flex; gap: 1.5rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .nav-links, .nav-status { display: none; }
    .hamburger { display: flex; }

    main { padding: 0 1.25rem; padding-top: var(--nav-h); }
    footer { padding: 1.25rem; }
    .nav-inner { padding: 0 1.25rem; }

    .hero { padding: 3.5rem 0 3rem; }
    section { padding: 3rem 0; }

    .about-body { grid-template-columns: 1fr; gap: 2rem; }
    .projects-grid { grid-template-columns: 1fr; }
    .stack-groups { grid-template-columns: 1fr; gap: 2rem; }

    footer { flex-direction: column; text-align: center; gap: 0.75rem; }
}