/* Base */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    --background: #0e120e;
    --foreground: #e2f1e2;
    --muted: #8aa78a;
    --surface: #101710;
    --surface-2: #142014;
    --border: #182418;
    --accent: #7fc27f;
    --accent-2: #a7e6a7;
    --font-body: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    --font-heading: ui-rounded, system-ui, -apple-system, Segoe UI, Roboto,
        Arial, sans-serif;
}

body {
    margin: 0;
    color: var(--foreground);
    background: var(--background);
    font-family: var(--font-body);
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

main.container {
    padding: 0;
}

main.container>section:not(.hero-fullscreen),
main.container>.card {
    padding: 24px;
}

/* Top Bar */
.site-header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 20;
    backdrop-filter: saturate(1.2) blur(6px);
    border-bottom: 1px solid #1b281b;
    background: #0f150f;
    height: 70px;
    display: flex;
    align-items: center;
}

.site-header .inner {
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: space-between;
    position: relative;
    height: 100%;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--foreground);
    text-decoration: none;
}

.logo {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-family: var(--font-heading);
    color: #0e120e;
    background: var(--accent);
    border: 1px solid #2a392a;
}

.site-nav {
    display: flex;
    gap: 16px;
    align-items: center;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 10px 8px;
    border-radius: 8px;
    position: relative;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--foreground);
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 8px;
    right: 8px;
    bottom: 6px;
    height: 2px;
    background: var(--accent);
    opacity: 0;
    transform: scaleX(0.5);
    transition: opacity 0.25s, transform 0.25s;
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
    opacity: 1;
    transform: none;
}

/* Mobile nav toggle */
.menu-toggle {
    display: none;
    align-items: center;
    gap: 8px;
    border: 1px solid #2a392a;
    background: var(--surface);
    color: var(--foreground);
    border-radius: 10px;
    padding: 8px 10px;
    cursor: pointer;
}

.menu-toggle .bars {
    width: 18px;
    height: 12px;
    position: relative;
    display: inline-block;
}

.menu-toggle .bars::before,
.menu-toggle .bars::after,
.menu-toggle .bars span {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--foreground);
    border-radius: 2px;
}

.menu-toggle .bars::before {
    top: 0;
}

.menu-toggle .bars::after {
    bottom: 0;
}

.menu-toggle .bars span {
    top: 5px;
}

/* Hero */
.hero {
    display: block;
    text-align: center;
}

.hero-fullscreen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.hero-card {
    max-width: 800px;
    margin: 0 auto;
    display: block;
}

.eyebrow {
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.85rem;
    margin: 0 0 6px;
    text-align: center;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4.2vw, 2.8rem);
    line-height: 1.15;
    margin: 0 0 10px;
    color: var(--accent-2);
    margin-bottom: 1.5rem;
}

.hero h1>span {
    display: inline-block;
    opacity: 0;
    animation: slideUpWord 0.6s ease forwards;
}

.hero h1>span:nth-child(1) {
    animation-delay: 0.1s;
}

.hero h1>span:nth-child(2) {
    animation-delay: 0.2s;
}

.hero h1>span:nth-child(3) {
    animation-delay: 0.3s;
}

.hero h1>span:nth-child(4) {
    animation-delay: 0.4s;
}

.hero h1>span:nth-child(5) {
    animation-delay: 0.5s;
}

.hero h1>span:nth-child(6) {
    animation-delay: 0.6s;
}

.hero h1>span:nth-child(7) {
    animation-delay: 0.7s;
}

.hero h1>span:nth-child(8) {
    animation-delay: 0.8s;
}

.hero h1>span:nth-child(9) {
    animation-delay: 0.9s;
}

.hero h1>span:nth-child(10) {
    animation-delay: 1s;
}

.hero h1>span:nth-child(11) {
    animation-delay: 1.1s;
}

@keyframes slideUpWord {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
    animation-delay: 0.2s;
}

.animate-fade-in-delayed {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
    animation-delay: 1.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.hero p {
    margin: 0 0 14px;
    margin-bottom: 2rem;
}

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

/* Sections */
section {
    margin-top: 48px;
}

section.hero-fullscreen {
    margin-top: 0;
}

section:first-of-type {
    margin-top: 0;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    margin: 24px 8px;
}

h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 2.2vw, 1.4rem);
    color: var(--accent);
    margin: 0 0 10px;
}

p.lead {
    color: var(--muted);
    margin-top: 0;
}

/* Skills (grouped tags) */
.skill-groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.group {
    background: var(--surface-2);
    border: 1px solid #223222;
    border-radius: 14px;
    padding: 12px;
}

.group h3 {
    margin: 0 0 8px;
    font-size: 0.95rem;
    color: var(--accent-2);
    letter-spacing: 0.02em;
    font-weight: 600;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tags>span {
    border: 1px solid #263626;
    border-radius: 999px;
    padding: 4px 8px;
    font-size: 0.85rem;
    color: var(--muted);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 20px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #204020;
}

.t-item {
    position: relative;
    margin: 14px 0;
    padding-left: 18px;
}

.t-item::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0.45rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
}

.t-role {
    font-weight: 600;
}

.t-org a {
    color: var(--accent);
}

.t-bullets {
    margin: 0.3rem 0 0.2rem 1rem;
}

/* Projects */
.proj-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
}

.proj {
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-2);
    padding: 14px;
    transition: transform 0.2s ease;
}

.proj:hover {
    transform: translateY(-3px);
}

.stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0;
}

.badge {
    border: 1px solid #263626;
    border-radius: 999px;
    padding: 4px 8px;
    color: var(--muted);
    font-size: 0.85rem;
}

/* Links */
a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 2px;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
    color: var(--accent-2);
    text-decoration-color: var(--accent-2);
}

a:visited {
    color: var(--accent);
}

a:visited:hover {
    color: var(--accent-2);
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--foreground);
}

.btn:hover {
    background: var(--surface-2);
    transform: translateY(-2px);
}

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

.btn.primary:hover {
    background: var(--accent-2);
    border-color: var(--accent-2);
    color: var(--background);
}

/* Clickable project cards */
.proj {
    text-decoration: none;
    color: inherit;
    display: block;
}

.proj:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 2px;
}

/* Footer */
footer {
    border-top: 1px solid #1e2a1e;
    margin-top: 38px;
    padding: 18px 0;
    color: var(--muted);
}

footer .to-top {
    float: right;
}

/* Reveal + Scrollspy */
.reveal {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}

.revealed {
    opacity: 1;
    transform: none;
}

/* Responsive */
@media (max-width: 840px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .avatar {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 760px) {
    .container {
        padding: 16px;
    }

    main.container>section:not(.hero-fullscreen),
    main.container>.card {
        padding: 16px;
    }

    .hero-fullscreen {
        min-height: calc(100vh - 70px);
        padding: 24px 16px;
    }

    section {
        margin-top: 32px;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: fixed;
        left: 16px;
        right: 16px;
        top: 78px;
        /* 70px header height + 8px gap */
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 8px;
        gap: 0;
        display: none;
        z-index: 25;
    }

    .site-nav.is-open {
        display: flex;
        flex-direction: column;
    }

    .site-nav a {
        display: block;
        padding: 12px 10px;
        border-radius: 8px;
    }
}