:root {
    --bg: #0f1117;
    --panel: #161821;
    --panel-2: #1c2030;
    --text: #e6e9f0;
    --muted: #aab3c5;
    --line: #2a2f42;
    --brand-1: #5b8cff;
    --brand-2: #c58cff;
    --ok: #5bd7a7;
    --warn: #ffd166;
    --bad: #ff6b6b;
    --shadow: 0 10px 30px rgba(0,0,0,.30);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: auto;
}

body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
    color: var(--text);
    background: radial-gradient(1200px 800px at 10% -10%, rgba(91,140,255,.25), transparent 60%),
                radial-gradient(900px 700px at 90% 10%, rgba(197,140,255,.22), transparent 60%),
                linear-gradient(180deg, #0d0f15 0%, #0f1117 100%);
    min-height: 100vh;
    overflow-x: hidden;
    font-display: swap;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* Background grid pattern */
.background-grid {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: .22;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 42px 42px, 42px 42px;
}

/* Top navigation bar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: linear-gradient(180deg, #171922, #141722);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(6px);
    transform: translateZ(0);
    will-change: transform;
}

.topbar .window-controls {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.dot.red {
    background: #ff5f57;
}

.dot.yellow {
    background: #ffbd2e;
}

.dot.green {
    background: #28c840;
}

.topbar nav a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 16px;
    font-size: 14px;
}

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

/* Main container */
.container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 16px;
    max-width: 1200px;
    margin: 24px auto;
    padding: 0 16px;
}

@media (max-width: 980px) {
    .container {
        grid-template-columns: 1fr;
        gap: 12px;
        margin: 16px auto;
    }
}

/* Sidebar */
.sidebar {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.sidebar .heading {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
}

.sidebar .tree {
    padding: 10px;
}

.tree a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--muted);
    text-decoration: none;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
}

.tree a.active,
.tree a:hover {
    color: var(--text);
    background: linear-gradient(90deg, rgba(91,140,255,.15), transparent);
}

/* Hero section */
.hero {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 24px;
    align-items: center;
}

@media (max-width: 980px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 44px;
    line-height: 1.15;
    min-height: 1.15em;
}

@media (max-width: 980px) {
    .hero h1 {
        font-size: 36px;
    }
}

.hero .lead {
    color: var(--muted);
    font-size: 18px;
}

.hero .badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.badge {
    font-size: 12px;
    padding: 6px 10px;
    border: 1px solid var(--line);
    color: var(--muted);
    border-radius: 999px;
}

.persona {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--line);
    background: #0d0f14;
    display: grid;
    place-items: center;
    min-height: 280px;
}

@media (max-width: 980px) {
    .persona {
        min-height: 200px;
        width: 80%;
        max-width: 280px;
        margin: 0 auto;
    }
}

.persona img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: linear-gradient(45deg, #1a1d2e 25%, transparent 25%),
                linear-gradient(-45deg, #1a1d2e 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #1a1d2e 75%),
                linear-gradient(-45deg, transparent 75%, #1a1d2e 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Sections */
section {
    margin: 54px 0;
}

section h2 {
    margin: 0 0 12px;
    font-size: 28px;
}

.muted {
    color: var(--muted);
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

@media (max-width: 980px) {
    .cards {
        grid-template-columns: 1fr;
    }
}

.card {
    background: #131723;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 18px;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: -60% -60% auto auto;
    width: 220px;
    height: 220px;
    background: radial-gradient(closest-side, rgba(91,140,255,.15), transparent 70%);
    transform: rotate(20deg);
}

.kv {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.kv span {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(255,255,255,.04);
    color: var(--muted);
    border: 1px solid var(--line);
}

/* Lists */
.list {
    display: grid;
    gap: 8px;
}

li + li {
    margin-top: 4px;
}

/* Footer */
.footer {
    margin: 48px 0 24px;
    color: var(--muted);
    font-size: 14px;
    text-align: center;
    opacity: .8;
}

/* Sections always visible */
.reveal,
.reveal.visible {
    opacity: 1;
    transform: none;
}

/* Code style callouts */
.code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    background: #121525;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 12px;
    color: #cdd8ff;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
    overflow: auto;
}

/* Terminal */
.terminal {
    background: #0b0d13;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 14px;
    color: #c6d0e9;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.cursor {
    display: inline-block;
    width: 10px;
    background: #c6d0e9;
    height: 1.05em;
    vertical-align: -2px;
    animation: blink 1.1s steps(1,end) infinite;
}

@keyframes blink {
    50% {
        background: transparent;
    }
}

/* Contact block */
.contact-block {
    margin-top: 20px;
}

.contact-block p {
    margin: 8px 0;
}

/* Links */
a.underlined-link {
    color: var(--text);
    text-decoration: underline;
}

/* Accessibility */
a:focus,
button:focus {
    outline: 2px dashed var(--brand-1);
    outline-offset: 2px;
}