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

:root {
    --paper: #F6F4EE;
    --paper-deep: #EFECE2;
    --ink: #16140F;
    --ink-soft: #6E675A;
    --accent: #B8420C;
    --accent-ink: #F6F4EE;
    --accent-warm: #EF9563;
    --hairline: rgba(22, 20, 15, 0.16);
    --term-bg: #16140F;
    --term-text: #E9E5DA;
    --term-dim: #8B857A;
    --term-label: #EF9563;
    --term-ok: #69B08A;
    --term-warn: #E5C069;
    --font-serif: 'Newsreader', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
    --measure: 34em;
    --gutter: clamp(1.25rem, 5vw, 5rem);
}

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    font-optical-sizing: auto;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.55;
    font-size: 1.125rem;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-weight: 400;
    line-height: 1.08;
    letter-spacing: -0.01em;
}

em {
    font-style: italic;
    color: var(--accent);
}

a {
    color: inherit;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Navigation: light over the dark hero, inverts once the paper begins */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 1.1rem var(--gutter);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    color: var(--paper);
    transition: background 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
}

nav.scrolled {
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    backdrop-filter: blur(8px);
    box-shadow: 0 1px 0 var(--hairline);
    color: var(--ink);
}

.wordmark {
    font-weight: 700;
    text-decoration: none;
}

.nav-cta {
    text-decoration: none;
    color: var(--accent-warm);
    border-bottom: 1px solid var(--accent-warm);
    padding-bottom: 2px;
    transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.nav-cta:hover {
    background: var(--accent-warm);
    color: var(--ink);
}

nav.scrolled .nav-cta {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

nav.scrolled .nav-cta:hover {
    background: var(--accent);
    color: var(--accent-ink);
}

/* Hero: the page opens dark and closes dark, paper in between */
.hero {
    background: var(--ink);
    color: var(--paper);
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 6rem var(--gutter) 4rem;
}

.hero :focus-visible {
    outline-color: var(--accent-warm);
}

.hero-inner {
    width: 100%;
    max-width: 78rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-meta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(246, 244, 238, 0.5);
    margin-bottom: 1.6rem;
}

.hero h1 {
    font-size: clamp(2.9rem, 8.4vw, 6.4rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    max-width: 12em;
    margin-bottom: 1.5rem;
}

.hero em {
    color: var(--accent-warm);
}

/* Skill line: markup ships every skill, so the no-JS and reduced-motion
   fallback is the full list. JS collapses it to one cycling word. */
.hero-line {
    font-family: var(--font-mono);
    font-size: clamp(0.85rem, 1.6vw, 1.1rem);
    color: rgba(246, 244, 238, 0.55);
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.7em;
    margin-bottom: 1.7rem;
}

.hero-skills {
    color: var(--accent-warm);
}

.hero-skills span + span::before {
    content: ' · ';
    color: rgba(246, 244, 238, 0.3);
}

.kinetic-word {
    display: inline-block;
    min-width: 15ch;
    transition: opacity 0.28s ease;
}

.kinetic-word.out {
    opacity: 0;
}

.hero-sub {
    font-size: clamp(1.15rem, 2vw, 1.35rem);
    color: rgba(246, 244, 238, 0.62);
    max-width: 30em;
    margin-bottom: 2rem;
}

.hero-cta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    color: var(--paper);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-warm);
    padding-bottom: 4px;
    transition: background 0.3s ease, color 0.3s ease;
}

.hero-cta:hover {
    background: var(--accent-warm);
    color: var(--ink);
}

.load-reveal {
    opacity: 0;
    transform: translateY(22px);
    animation: rise 0.9s cubic-bezier(0.2, 0.6, 0.2, 1) forwards;
}

.hero-inner .load-reveal:nth-child(2) { animation-delay: 0.15s; }
.hero-inner .load-reveal:nth-child(3) { animation-delay: 0.30s; }
.hero-inner .load-reveal:nth-child(4) { animation-delay: 0.45s; }
.hero-inner .load-reveal:nth-child(5) { animation-delay: 0.60s; }

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

/* Peak: pinned agent trace */
.peak {
    padding-top: clamp(2.5rem, 7vh, 5rem);
}

.peak-intro {
    padding: 0 var(--gutter);
    max-width: 68rem;
}

.peak-intro h2 {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    margin-bottom: 1rem;
}

.peak-note {
    color: var(--ink-soft);
    max-width: var(--measure);
}

.trace-track {
    height: 340vh;
    position: relative;
}

.trace-sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(var(--paper) 0%, var(--paper-deep) 50%, var(--paper) 100%);
}

.trace-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
    width: 100%;
    max-width: 78rem;
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.terminal {
    background: var(--term-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 30px 60px -20px rgba(22, 20, 15, 0.45);
}

.terminal-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 1.1rem;
    border-bottom: 1px solid rgba(233, 229, 218, 0.12);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--term-dim);
}

.terminal-tag {
    color: var(--term-warn);
    border: 1px solid currentColor;
    border-radius: 3px;
    padding: 0.1rem 0.45rem;
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.terminal-body {
    font-family: var(--font-mono);
    font-size: clamp(0.68rem, 1.05vw, 0.82rem);
    line-height: 1.75;
    color: var(--term-text);
    padding: 1.2rem 1.3rem 1.5rem;
    height: min(62vh, 540px);
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-word;
}

.t-label { color: var(--term-label); }
.t-dim   { color: var(--term-dim); }
.t-ok    { color: var(--term-ok); }
.t-warn  { color: var(--term-warn); }

.cursor {
    display: inline-block;
    width: 0.55em;
    height: 1.1em;
    background: var(--term-text);
    vertical-align: text-bottom;
    animation: blink 1s steps(1) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.trace-captions {
    position: relative;
    min-height: 11rem;
}

.trace-caption {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.45s ease, transform 0.45s ease;
    pointer-events: none;
}

.trace-caption.active {
    opacity: 1;
    transform: translateY(0);
}

.trace-caption h3 {
    font-size: clamp(1.6rem, 2.8vw, 2.3rem);
    margin-bottom: 0.9rem;
}

.trace-caption p {
    color: var(--ink-soft);
    max-width: 24em;
}

/* Statement: sharpens from soft to ink as it crosses the viewport centre.
   The dimmed state only applies when JS runs (html.js), so the page stays
   readable if scripts fail to load. */
.statement {
    padding: clamp(4rem, 10vh, 6rem) var(--gutter);
    max-width: 68rem;
}

.claim {
    font-size: clamp(1.6rem, 3.6vw, 2.7rem);
    line-height: 1.3;
    max-width: 22em;
}

.js .claim {
    color: var(--ink-soft);
    opacity: 0.35;
    transition: color 0.6s ease, opacity 0.6s ease;
}

.js .claim.in-focus {
    color: var(--ink);
    opacity: 1;
}

/* Close: resolves and holds */
.close {
    background: var(--ink);
    color: var(--paper);
    min-height: 58vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4.5rem var(--gutter) 2rem;
}

.close h2 {
    font-size: clamp(2.6rem, 6vw, 4.6rem);
    font-weight: 300;
    margin-bottom: 1.2rem;
}

.close p {
    color: rgba(246, 244, 238, 0.65);
    font-size: 1.25rem;
    max-width: var(--measure);
    margin-bottom: 2rem;
}

.close-cta {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2.4vw, 1.5rem);
    color: var(--paper);
    text-decoration: none;
    border-bottom: 2px solid var(--accent);
    align-self: flex-start;
    padding-bottom: 4px;
    transition: background 0.3s ease, color 0.3s ease;
}

.close-cta:hover {
    background: var(--accent);
    color: var(--accent-ink);
}

.close footer {
    margin-top: auto;
    padding-top: 3rem;
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(246, 244, 238, 0.45);
}

/* Mobile */
@media (max-width: 820px) {
    .hero-line {
        font-size: 0.8rem;
    }

    .kinetic-word {
        min-width: 13ch;
    }

    .trace-grid {
        grid-template-columns: 1fr;
        gap: 1.6rem;
        align-items: start;
        padding-top: 4.5rem;
    }

    .terminal-body {
        height: 44vh;
    }

    .trace-captions {
        min-height: 9rem;
    }

    .close footer {
        flex-direction: column;
        gap: 0.4rem;
    }
}

/* Reduced motion: show everything, no scrub dependency */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .load-reveal {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .kinetic-word {
        transition: none;
    }

    .js .claim {
        color: var(--ink);
        opacity: 1;
        transition: none;
    }

    .trace-track {
        height: auto;
    }

    .trace-sticky {
        position: static;
        height: auto;
        padding: 3rem 0;
    }

    .trace-captions .trace-caption {
        position: static;
        opacity: 1;
        transform: none;
        margin-bottom: 2rem;
    }

    .terminal-body {
        height: auto;
        overflow: visible;
    }

    .cursor {
        animation: none;
    }
}