/* ============================================================
   amitj.me — "Mission Control" design system
   Cinematic dark · phosphor green + amber · Bricolage + Fragment Mono
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
    color-scheme: dark;

    /* color — deep blue-green night, brand-tinted neutrals (OKLCH) */
    --bg:            oklch(14.5% 0.012 170);
    --bg-elev:       oklch(17%   0.014 170);
    --surface:       oklch(19.5% 0.016 170);
    --surface-2:     oklch(23%   0.018 170);
    --line:          oklch(30%   0.02  170);
    --line-soft:     oklch(24%   0.016 170);
    --ink:           oklch(94%   0.01  170);
    --ink-2:         oklch(78%   0.022 170);
    --ink-3:         oklch(65%   0.024 170);
    --phosphor:      oklch(86%   0.21  155);
    --phosphor-soft: oklch(72%   0.14  155);
    --phosphor-tint: oklch(86% 0.21 155 / 0.09);
    --phosphor-glow: oklch(86% 0.21 155 / 0.28);
    --amber:         oklch(84%   0.14  85);
    --amber-soft:    oklch(74%   0.11  85);
    --on-accent:     oklch(16%   0.03  165);

    /* type */
    --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
    --font-mono: "Fragment Mono", "SF Mono", "Cascadia Code", Menlo, monospace;
    --text-hero:     clamp(3.25rem, 9vw + 0.5rem, 6rem);
    --text-title:    clamp(1.9rem, 3.6vw + 0.6rem, 3.1rem);
    --text-headline: clamp(2.4rem, 6vw + 0.5rem, 4.4rem);
    --text-sub:      clamp(1.25rem, 1.2vw + 0.9rem, 1.5rem);
    --text-lede:     clamp(1.1rem, 0.8vw + 0.9rem, 1.3rem);
    --text-body:     1.0625rem;
    --text-mono:     0.8125rem;
    --text-mono-sm:  0.75rem;

    /* space */
    --space-2xs: 0.5rem;
    --space-xs:  0.75rem;
    --space-sm:  1rem;
    --space-md:  1.5rem;
    --space-lg:  2.5rem;
    --space-xl:  4rem;
    --space-section: clamp(6rem, 14vh, 10rem);
    --gutter: clamp(1.25rem, 5vw, 3rem);
    --measure: 65ch;

    /* motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --dur-fast: 160ms;
    --dur-med: 280ms;
    --dur-slow: 480ms;

    /* z scale */
    --z-canvas: -1;
    --z-nav: 100;
    --z-chat: 600;
    --z-terminal: 700;
    --z-toast: 800;
}

/* Light theme — the same room at daylight: identical hues (170 neutral,
   phosphor 155, amber 85), lightness ramp inverted. Accents deepen to
   emerald and bronze so every text role clears WCAG AA on the paper bg. */
:root[data-theme="light"] {
    color-scheme: light;

    --bg:            oklch(95.5% 0.008 170);
    --bg-elev:       oklch(97.5% 0.006 170);
    --surface:       oklch(98.8% 0.005 170);
    --surface-2:     oklch(93%   0.012 170);
    --line:          oklch(86%   0.018 170);
    --line-soft:     oklch(90.5% 0.013 170);
    --ink:           oklch(21%   0.02  170);
    --ink-2:         oklch(36%   0.025 170);
    --ink-3:         oklch(46%   0.025 170);
    --phosphor:      oklch(46%   0.108 152);
    --phosphor-soft: oklch(58%   0.11  155);
    --phosphor-tint: oklch(46% 0.108 152 / 0.08);
    --phosphor-glow: oklch(58% 0.14 155 / 0.22);
    --amber:         oklch(50%   0.103 85);
    --amber-soft:    oklch(62%   0.10  85);
    --on-accent:     oklch(98.5% 0.01  155);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

/* native anchor scrolling lands sections clear of the fixed nav */
section[id], [id="top"] { scroll-margin-top: 4rem; }

body {
    background-color: #0b1210; /* fallback */
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-display);
    font-optical-sizing: auto;
    font-size: var(--text-body);
    font-weight: 400;
    letter-spacing: 0.005em;
    line-height: 1.65;
    min-height: 100svh;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

img, svg, canvas { max-width: 100%; }

.mono {
    font-family: var(--font-mono);
    font-size: var(--text-mono);
    letter-spacing: 0.02em;
}

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

.skip-link {
    position: absolute;
    left: var(--space-sm);
    top: -100%;
    z-index: var(--z-toast);
    background: var(--phosphor);
    color: var(--on-accent);
    padding: 0.6em 1.2em;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-sm); }

/* ---------- Constellation canvas ---------- */
#constellation {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100lvh;
    z-index: var(--z-canvas);
    pointer-events: none;
    /* graceful degrade before JS paints: faint depth */
    background:
        radial-gradient(120% 90% at 75% 10%, oklch(20% 0.03 165 / 0.5) 0%, transparent 55%),
        radial-gradient(90% 70% at 15% 85%, oklch(19% 0.028 90 / 0.35) 0%, transparent 60%);
}

/* ---------- Navigation ---------- */
.site-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 0.9rem var(--gutter);
    transition: background-color var(--dur-med) var(--ease-out),
                border-color var(--dur-med) var(--ease-out),
                backdrop-filter var(--dur-med) var(--ease-out);
    border-bottom: 1px solid transparent;
}
.site-nav.scrolled {
    background: oklch(14.5% 0.012 170 / 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--line-soft);
}

.wordmark {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 400;
    color: var(--ink);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    letter-spacing: 0.02em;
}
.wordmark-cursor {
    display: inline-block;
    width: 0.55em;
    height: 1.05em;
    margin-left: 0.18em;
    background: var(--phosphor);
    animation: caret-blink 1.2s step-end infinite;
}
@keyframes caret-blink { 0%, 55% { opacity: 1; } 56%, 100% { opacity: 0; } }

.nav-links {
    display: flex;
    gap: clamp(1rem, 2.5vw, 2rem);
    margin-inline: auto;
}
.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--ink-2);
    text-decoration: none;
    padding: 0.35em 0;
    position: relative;
    transition: color var(--dur-fast) var(--ease-out);
}
.nav-links a::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 100%;
    height: 1.5px;
    background: var(--phosphor);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--dur-med) var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-left: auto;
}
.nav-links + .nav-actions { margin-left: 0; }

.btn-terminal,
.btn-theme {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--phosphor);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 0.45em 0.7em;
    cursor: pointer;
    transition: border-color var(--dur-fast) var(--ease-out),
                background-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out);
}
.btn-terminal:hover,
.btn-theme:hover {
    border-color: var(--phosphor-soft);
    background: var(--phosphor-tint);
    box-shadow: 0 0 18px var(--phosphor-glow);
}

/* theme toggle: sun offered in the dark, moon offered in the light */
.btn-theme { display: inline-flex; align-items: center; padding: 0.45em 0.55em; }
.btn-theme svg { width: 1.05em; height: 1.05em; display: block; }
.btn-theme .icon-moon { display: none; }
[data-theme="light"] .btn-theme .icon-sun { display: none; }
[data-theme="light"] .btn-theme .icon-moon { display: block; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55em;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1;
    padding: 0.95em 1.5em;
    border-radius: 12px;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--dur-fast) var(--ease-out),
                background-color var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out),
                color var(--dur-fast) var(--ease-out);
}
.btn:active { transform: scale(0.975); }

.btn-primary {
    background: var(--phosphor);
    color: var(--on-accent);
}
.btn-primary:hover {
    box-shadow: 0 6px 32px var(--phosphor-glow);
    transform: translateY(-1px);
}
.btn-primary .btn-arrow { transition: transform var(--dur-fast) var(--ease-out); }
.btn-primary:hover .btn-arrow { transform: translateX(4px); }

.btn-ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--line);
}
.btn-ghost:hover {
    border-color: var(--phosphor-soft);
    color: var(--phosphor);
    background: var(--phosphor-tint);
}

/* when JS owns the transform (magnetic), CSS stops transitioning it */
.btn.magnetized {
    transition: background-color var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out),
                color var(--dur-fast) var(--ease-out);
}

.btn-sm { font-size: 0.875rem; padding: 0.6em 1.05em; border-radius: 9px; }
.btn-lg { font-size: 1.0625rem; padding: 1.05em 1.7em; }

.text-link {
    color: var(--ink-2);
    text-decoration: underline;
    text-decoration-color: var(--line);
    text-underline-offset: 5px;
    transition: color var(--dur-fast) var(--ease-out),
                text-decoration-color var(--dur-fast) var(--ease-out);
}
.text-link:hover { color: var(--phosphor); text-decoration-color: var(--phosphor); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    padding: calc(4.5rem + 4vh) var(--gutter) 0;
}
.hero-inner {
    margin: auto 0;
    max-width: 72rem;
    width: 100%;
    align-self: center;
}

.hero-status {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.2rem 0.6em;
    color: var(--ink-3);
    margin-bottom: var(--space-md);
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--phosphor);
    box-shadow: 0 0 10px var(--phosphor-glow), 0 0 3px var(--phosphor);
    animation: status-pulse 2.6s var(--ease-out) infinite;
    flex-shrink: 0;
}
@keyframes status-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.45; }
}
#melb-clock { font-variant-numeric: tabular-nums; color: var(--ink-2); }

.hero-name {
    font-size: var(--text-hero);
    font-weight: 750;
    font-variation-settings: "opsz" 96;
    letter-spacing: -0.03em;
    line-height: 0.95;
    text-wrap: balance;
    margin-bottom: 0.2em;
}

.hero-role {
    color: var(--amber);
    font-size: clamp(0.9375rem, 1.4vw, 1.125rem);
    margin-bottom: var(--space-lg);
}
.hero-x { color: var(--ink-3); }

.hero-lede {
    font-size: var(--text-lede);
    font-weight: 380;
    color: var(--ink-2);
    max-width: 46ch;
    line-height: 1.55;
    margin-bottom: var(--space-lg);
}
.hero-lede strong { color: var(--ink); font-weight: 620; }

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.proof-strip {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    column-gap: 2.5rem;
    row-gap: 0.6rem;
    margin-top: auto;
    padding: 1.35rem 0;
    /* reserve the corner where the oneai chat button floats */
    padding-right: clamp(5rem, 9vw, 7.5rem);
    padding-bottom: max(1.35rem, env(safe-area-inset-bottom));
    border-top: 1px solid var(--line-soft);
    color: var(--ink-3);
    font-size: var(--text-mono-sm);
}
.proof-strip li { white-space: nowrap; }

.scroll-cue {
    position: absolute;
    right: var(--gutter);
    bottom: 6.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    color: var(--ink-3);
    font-size: var(--text-mono-sm);
    text-decoration: none;
    writing-mode: vertical-rl;
    transition: color var(--dur-fast) var(--ease-out);
}
.scroll-cue:hover { color: var(--phosphor); }
.scroll-cue-line {
    width: 1px;
    height: 3.4rem;
    background: linear-gradient(to bottom, var(--line), transparent);
    overflow: hidden;
    position: relative;
}
.scroll-cue-line::after {
    content: "";
    position: absolute;
    top: -40%;
    left: 0;
    width: 100%;
    height: 40%;
    background: var(--phosphor);
    animation: cue-drop 2.2s var(--ease-out-expo) infinite;
}
@keyframes cue-drop {
    0% { top: -40%; opacity: 0; }
    25% { opacity: 1; }
    100% { top: 110%; opacity: 0; }
}

/* ---------- Sections ---------- */
.section {
    position: relative;
    max-width: 76rem;
    margin: 0 auto;
    padding: var(--space-section) var(--gutter) 0;
}

.path-marker {
    color: var(--phosphor-soft);
    margin-bottom: var(--space-sm);
}
.path-marker::before { content: "$ cd "; color: var(--ink-3); }

/* masked per-word title reveals (scroll cinema) */
.w-mask {
    display: inline-block;
    overflow: hidden;
    vertical-align: bottom;
    padding-bottom: 0.08em;   /* room for descenders while masked */
    margin-bottom: -0.08em;
}
.w-mask .w { display: inline-block; }

.section-title {
    font-size: var(--text-title);
    font-weight: 640;
    letter-spacing: -0.02em;
    line-height: 1.06;
    text-wrap: balance;
    max-width: 24ch;
    margin-bottom: var(--space-lg);
}
.accent-dot { color: var(--phosphor); }

/* ---------- About ---------- */
.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
}
.about-copy p {
    max-width: var(--measure);
    color: var(--ink-2);
    margin-bottom: 1.2em;
    text-wrap: pretty;
}
.about-copy p strong { color: var(--ink); font-weight: 600; }
.about-copy .section-title { color: var(--ink); }

.about-card {
    position: sticky;
    top: 6rem;
    background: var(--bg-elev);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 24px 60px oklch(5% 0.01 170 / 0.45);
}
.about-card-bar {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.7rem 1rem;
    color: var(--ink-3);
    font-size: var(--text-mono-sm);
    border-bottom: 1px solid var(--line-soft);
    background: var(--surface);
}
.card-dots { display: inline-flex; gap: 5px; }
.card-dots i {
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--line);
}
.card-dots i:first-child { background: var(--phosphor-soft); }

.about-yaml {
    padding: 1.2rem 1.25rem 1.35rem;
    font-size: var(--text-mono);
    line-height: 1.9;
    overflow-x: auto;
    white-space: pre;
}
.about-yaml .y-line { display: block; }
.about-yaml .y-line.typing::after {
    content: "";
    display: inline-block;
    width: 0.55em;
    height: 1em;
    margin-left: 3px;
    vertical-align: -0.15em;
    background: var(--phosphor);
    animation: caret-blink 0.9s step-end infinite;
}
.about-yaml .y-key { color: var(--phosphor-soft); }
.about-yaml .y-comment { color: var(--ink-3); }
.about-yaml .y-accent { color: var(--amber); }
.about-yaml a { color: var(--ink-2); text-underline-offset: 4px; }
.about-yaml a:hover { color: var(--phosphor); }

/* ---------- Journey / timeline ---------- */
.timeline { position: relative; }
.timeline-rail {
    position: absolute;
    top: 0.6rem; bottom: 0.6rem;
    left: 0;
    width: 1px;
    background: var(--line-soft);
}
.timeline-rail-fill {
    position: absolute;
    top: 0; left: -0.5px;
    width: 2px;
    height: 0%;
    background: linear-gradient(to bottom, var(--phosphor), var(--phosphor-soft));
    box-shadow: 0 0 12px var(--phosphor-glow);
}

.timeline-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: clamp(2.5rem, 6vh, 4rem);
}
.timeline-item {
    position: relative;
    padding-left: clamp(1.75rem, 4vw, 3rem);
    max-width: 46rem;
}
.timeline-item::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 0.5rem;
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--phosphor-soft);
}
.tl-period { color: var(--amber); margin-bottom: 0.4rem; }
.tl-role {
    font-size: var(--text-sub);
    font-weight: 620;
    letter-spacing: -0.01em;
    line-height: 1.2;
}
.tl-org { color: var(--ink-3); font-weight: 500; margin: 0.15rem 0 0.6rem; }
.tl-desc { color: var(--ink-2); text-wrap: pretty; }
.tl-desc em { font-style: normal; color: var(--ink); }
.metric {
    color: var(--phosphor);
    font-size: 0.9em;
    white-space: nowrap;
}
.timeline-edu .tl-role { font-size: 1.0625rem; }

/* ---------- Work ---------- */
.project {
    position: relative;
    background: var(--bg-elev);
    border: 1px solid var(--line-soft);
    border-radius: 16px;
    padding: clamp(1.5rem, 3vw, 2.25rem);
    transition: border-color var(--dur-med) var(--ease-out),
                transform var(--dur-med) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out);
}
/* pointer-tracking glow (tactile micro) */
.project::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(280px circle at var(--gx, 50%) var(--gy, 50%),
        oklch(86% 0.21 155 / 0.12), transparent 68%);
    opacity: 0;
    transition: opacity var(--dur-med) var(--ease-out);
    pointer-events: none;
}
.project:hover::after { opacity: 1; }
/* when JS owns the transform (tilt), CSS stops transitioning it */
.project.tilt {
    transition: border-color var(--dur-med) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out);
}
.project:hover {
    border-color: var(--line);
    transform: translateY(-3px);
    box-shadow: 0 18px 48px oklch(5% 0.01 170 / 0.4);
}

.project-flagship {
    display: grid;
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
    padding: clamp(2rem, 4.5vw, 3.25rem);
    margin-bottom: var(--space-md);
    background:
        radial-gradient(90% 120% at 85% 0%, var(--phosphor-tint) 0%, transparent 55%),
        var(--bg-elev);
}
.project-flagship .project-tag { grid-column: 1 / -1; }
@media (min-width: 901px) {
    /* name top-left, description right, metrics anchored bottom-left */
    .project-flagship .project-name { grid-column: 1; grid-row: 2; }
    .project-flagship .project-desc { grid-column: 2; grid-row: 2 / span 2; }
    .project-flagship .project-metrics { grid-column: 1; grid-row: 3; align-self: end; }
}

.project-tag {
    color: var(--amber);
    font-size: var(--text-mono-sm);
    margin-bottom: 0.9rem;
}
.project-name {
    font-size: clamp(1.4rem, 2.2vw, 1.9rem);
    font-weight: 640;
    letter-spacing: -0.015em;
    line-height: 1.15;
    margin-bottom: 0.55rem;
}
.project-flagship .project-name { font-size: clamp(1.9rem, 3.4vw, 2.8rem); }
.project-name a {
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease-out);
}
.project-name a:hover { color: var(--phosphor); }
.project-name a::after {
    content: " ↗";
    font-size: 0.6em;
    color: var(--ink-3);
    vertical-align: 0.35em;
}
.project-desc {
    color: var(--ink-2);
    max-width: 58ch;
    text-wrap: pretty;
    margin-bottom: 1.1rem;
}
.project-metrics {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    color: var(--phosphor);
    font-size: var(--text-mono-sm);
}
.project-metrics li::before { content: "▸ "; color: var(--phosphor-soft); }
.project-flagship .project-metrics { gap: 0.7rem; font-size: var(--text-mono); }

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}
.project-grid .project-metrics {
    flex-direction: row;
    flex-wrap: wrap;
    column-gap: 1.2rem;
    margin-top: auto;
}
.project-grid .project { display: flex; flex-direction: column; }
/* personal build closes the grid full-width, mirroring the flagship opener */
.project-grid .project-closer {
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    column-gap: clamp(1.5rem, 4vw, 3rem);
    background:
        radial-gradient(70% 130% at 12% 0%, oklch(84% 0.14 85 / 0.06) 0%, transparent 55%),
        var(--bg-elev);
}
.project-grid .project-closer .project-tag { flex-basis: 100%; }
.project-grid .project-closer .project-desc { flex: 1 1 24rem; margin-bottom: 0; }
.project-grid .project-closer .project-metrics { margin-top: 0; flex-direction: column; row-gap: 0.45rem; }

.project-more {
    margin-top: var(--space-lg);
    color: var(--ink-2);
    max-width: none;
    line-height: 2;
}
.project-more .mono { color: var(--ink-3); }
.project-more a { color: var(--ink-2); text-underline-offset: 4px; text-decoration-color: var(--line); }
.project-more a:hover { color: var(--phosphor); text-decoration-color: var(--phosphor); }

/* ---------- Stack ---------- */
.stack { margin-top: var(--space-xl); }
.stack-title {
    color: var(--phosphor-soft);
    font-size: var(--text-mono);
    font-weight: 400;
    margin-bottom: var(--space-md);
}
.stack-hint { color: var(--ink-3); }

.stack-groups {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--line-soft);
}
.stack-group {
    display: grid;
    grid-template-columns: minmax(9rem, 12rem) 1fr;
    gap: var(--space-sm);
    align-items: baseline;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--line-soft);
}
.stack-label { color: var(--ink-3); font-weight: 400; font-size: var(--text-mono-sm); }
.chips {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.chip {
    font-family: var(--font-mono);
    font-size: var(--text-mono-sm);
    color: var(--ink-2);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    padding: 0.35em 0.85em;
    cursor: default;
    transition: border-color var(--dur-fast) var(--ease-out),
                color var(--dur-fast) var(--ease-out),
                transform 100ms var(--ease-out),
                box-shadow 100ms var(--ease-out);
}
.chip:hover { border-color: var(--line); color: var(--ink); transform: translateY(-1px); }
/* keycap press */
.chip:active {
    transform: translateY(1px) scale(0.97);
    box-shadow: inset 0 1px 3px oklch(5% 0.01 170 / 0.55);
}
.chip-expert {
    color: var(--phosphor);
    border-color: oklch(72% 0.14 155 / 0.45);
    background: var(--phosphor-tint);
}
.chip-expert:hover { border-color: var(--phosphor-soft); color: var(--phosphor); }

/* ---------- Voices ---------- */
.quotes {
    display: flex;
    flex-direction: column;
    gap: clamp(3rem, 8vh, 5rem);
}
.quote { max-width: 46rem; position: relative; }
.quote:nth-child(2) { margin-left: auto; }
.quote blockquote p {
    font-size: clamp(1.25rem, 1.6vw + 0.8rem, 1.7rem);
    font-weight: 380;
    line-height: 1.45;
    color: var(--ink-2);
    text-wrap: pretty;
}
.quote blockquote p::before { content: "“"; color: var(--phosphor-soft); }
.quote blockquote p::after { content: "”"; color: var(--phosphor-soft); }
.quote mark {
    background: transparent;
    color: var(--ink);
    text-decoration: underline;
    text-decoration-color: var(--phosphor);
    text-decoration-thickness: 2px;
    text-underline-offset: 6px;
}
.quote figcaption {
    margin-top: 1.1rem;
    color: var(--ink-3);
}
.quote figcaption::before { content: "── "; color: var(--phosphor-soft); }
.quotes-link { margin-top: var(--space-lg); }

/* ---------- Writing ---------- */
.writing-grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 6vw, 5rem);
    align-items: start;
}
.writing-sub {
    color: var(--ink-3);
    font-weight: 400;
    font-size: var(--text-mono-sm);
    margin-bottom: 0.8rem;
}
.speaking .writing-sub { margin-top: var(--space-lg); }
.speaking .writing-sub:first-child { margin-top: 0; }

.article-list { list-style: none; }
.article-list li { border-top: 1px solid var(--line-soft); }
.article-list li:last-child { border-bottom: 1px solid var(--line-soft); }
.article-list a {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: 1.05rem 0.75rem;
    margin-inline: -0.75rem;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color var(--dur-fast) var(--ease-out);
}
.article-list a:hover { background: var(--phosphor-tint); }
.article-title {
    font-weight: 520;
    color: var(--ink);
    line-height: 1.35;
    transition: color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.article-list a:hover .article-title { transform: translateX(4px); }
.article-list a:hover .article-title { color: var(--phosphor); }
.article-meta { color: var(--ink-3); white-space: nowrap; font-size: var(--text-mono-sm); }

.talk-list { list-style: none; display: flex; flex-direction: column; gap: 1.4rem; }
.talk-name-plain {
    font-weight: 620;
    font-size: 1.125rem;
    color: var(--ink);
}
.talk-name {
    font-weight: 620;
    font-size: 1.125rem;
    color: var(--ink);
    text-decoration: underline;
    text-decoration-color: var(--line);
    text-underline-offset: 5px;
    transition: color var(--dur-fast) var(--ease-out), text-decoration-color var(--dur-fast) var(--ease-out);
}
.talk-name:hover { color: var(--phosphor); text-decoration-color: var(--phosphor); }
.talk-venue { color: var(--ink-2); margin-top: 0.35rem; text-wrap: pretty; }

.cred-line {
    color: var(--ink-2);
    padding: 0.55rem 0;
    border-top: 1px solid var(--line-soft);
    display: flex;
    justify-content: space-between;
    gap: var(--space-sm);
    align-items: baseline;
}
.cred-line:last-of-type { border-bottom: 1px solid var(--line-soft); }
.cred-year { color: var(--ink-3); font-size: var(--text-mono-sm); }

/* ---------- Contact ---------- */
.contact {
    text-align: center;
    padding-bottom: var(--space-section);
}
.contact .path-marker { text-align: center; }
.contact-headline {
    font-size: var(--text-headline);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.02;
    text-wrap: balance;
    margin: 0 auto var(--space-md);
    max-width: 16ch;
}
.contact-lede {
    color: var(--ink-2);
    font-size: var(--text-lede);
    font-weight: 380;
    max-width: 52ch;
    margin: 0 auto var(--space-lg);
    text-wrap: pretty;
}
.contact-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}
.contact-alt { color: var(--ink-3); }
.contact-alt a {
    color: var(--ink-2);
    text-underline-offset: 4px;
    text-decoration-color: var(--line);
}
.contact-alt a:hover { color: var(--phosphor); text-decoration-color: var(--phosphor); }

.terminal-hint {
    display: inline-block;
    margin-top: var(--space-xl);
    color: var(--ink-3);
    background: transparent;
    border: 1px dashed var(--line);
    border-radius: 10px;
    padding: 0.7em 1.2em;
    cursor: pointer;
    font-size: var(--text-mono-sm);
    transition: color var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out);
}
.terminal-hint:hover {
    color: var(--phosphor);
    border-color: var(--phosphor-soft);
    box-shadow: 0 0 24px var(--phosphor-glow);
}
.terminal-hint kbd {
    font-family: var(--font-mono);
    border: 1px solid var(--line);
    border-bottom-width: 2px;
    border-radius: 5px;
    padding: 0.1em 0.45em;
    margin: 0 0.15em;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--line-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 2rem;
    justify-content: space-between;
    padding: 1.5rem var(--gutter) max(1.5rem, env(safe-area-inset-bottom));
    color: var(--ink-3);
    font-size: var(--text-mono-sm);
}
.site-footer .mono { font-size: var(--text-mono-sm); }
.site-footer a { color: var(--ink-2); text-underline-offset: 4px; }
.site-footer a:hover { color: var(--phosphor); }

/* ---------- oneai chat ---------- */
.chat-fab {
    position: fixed;
    right: max(1.25rem, env(safe-area-inset-right));
    bottom: max(1.25rem, env(safe-area-inset-bottom));
    z-index: var(--z-chat);
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    background: var(--surface);
    color: var(--phosphor);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.8em 1.1em;
    cursor: pointer;
    box-shadow: 0 10px 34px oklch(5% 0.01 170 / 0.5);
    transition: border-color var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-med) var(--ease-out),
                transform var(--dur-fast) var(--ease-out);
}
.chat-fab:hover {
    border-color: var(--phosphor-soft);
    box-shadow: 0 10px 40px var(--phosphor-glow);
    transform: translateY(-2px);
}
.chat-fab-label { font-size: var(--text-mono-sm); }
.chat-fab[aria-expanded="true"] { display: none; }

.chat-panel {
    position: fixed;
    right: max(1.25rem, env(safe-area-inset-right));
    bottom: max(1.25rem, env(safe-area-inset-bottom));
    z-index: var(--z-chat);
    width: min(24rem, calc(100vw - 2rem));
    height: min(32rem, 72vh);
    display: flex;
    flex-direction: column;
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 30px 80px oklch(5% 0.01 170 / 0.6);
}
.chat-panel[hidden] { display: none; }

.chat-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--line-soft);
    background: var(--surface);
}
.chat-head-title {
    display: flex;
    align-items: center;
    gap: 0.55em;
    color: var(--ink-2);
    font-size: var(--text-mono-sm);
}
.chat-head-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.chat-new {
    background: none;
    border: 1px solid var(--line);
    color: var(--ink-3);
    font-size: var(--text-mono-sm);
    line-height: 1;
    cursor: pointer;
    padding: 0.35em 0.55em;
    border-radius: 6px;
    transition: color var(--dur-fast) var(--ease-out),
                border-color var(--dur-fast) var(--ease-out);
}
.chat-new:hover { color: var(--phosphor); border-color: var(--phosphor-soft); }
.chat-close {
    background: none;
    border: none;
    color: var(--ink-3);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.1em 0.3em;
    border-radius: 6px;
    transition: color var(--dur-fast) var(--ease-out);
}
.chat-close:hover { color: var(--ink); }

.chat-log {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    overscroll-behavior: contain;
}
.chat-msg {
    max-width: 88%;
    padding: 0.7rem 0.95rem;
    border-radius: 12px;
    font-size: 0.9375rem;
    line-height: 1.55;
    white-space: pre-wrap;
    overflow-wrap: break-word;
}
.chat-msg-ai {
    align-self: flex-start;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-bottom-left-radius: 4px;
    color: var(--ink-2);
}
.chat-msg-user {
    align-self: flex-end;
    background: var(--phosphor-tint);
    border: 1px solid oklch(72% 0.14 155 / 0.35);
    border-bottom-right-radius: 4px;
    color: var(--ink);
}
.chat-msg-error { border-color: oklch(60% 0.19 25 / 0.5); color: oklch(78% 0.12 25); }

/* block caret while a reply types itself out */
.chat-msg-revealing p::after {
    content: "";
    display: inline-block;
    width: 0.5em;
    height: 1em;
    margin-left: 0.15em;
    vertical-align: text-bottom;
    background: var(--phosphor);
    animation: caret-blink 1.2s step-end infinite;
}

.chat-typing {
    align-self: flex-start;
    display: inline-flex;
    gap: 5px;
    padding: 0.85rem 1rem;
}
.chat-typing i {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--phosphor-soft);
    animation: typing-dot 1.2s var(--ease-out) infinite;
}
.chat-typing i:nth-child(2) { animation-delay: 0.15s; }
.chat-typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-dot {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-3px); }
}

.chat-suggests { display: flex; flex-direction: column; align-items: flex-start; gap: 0.5rem; }
.chat-suggest {
    font-size: var(--text-mono-sm);
    color: var(--ink-2);
    background: transparent;
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    padding: 0.45em 0.95em;
    cursor: pointer;
    text-align: left;
    transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.chat-suggest:hover { border-color: var(--phosphor-soft); color: var(--phosphor); }

.chat-form {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem;
    border-top: 1px solid var(--line-soft);
    background: var(--surface);
}
.chat-input {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--ink);
    font-family: var(--font-display);
    font-size: 16px; /* prevents iOS zoom */
    padding: 0.6em 0.9em;
    transition: border-color var(--dur-fast) var(--ease-out);
}
.chat-input::placeholder { color: var(--ink-3); }
.chat-input:focus { outline: none; border-color: var(--phosphor-soft); }
.chat-send {
    background: var(--phosphor);
    color: var(--on-accent);
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    width: 2.9rem;
    cursor: pointer;
    transition: box-shadow var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.chat-send:hover { box-shadow: 0 0 20px var(--phosphor-glow); }
.chat-send:active { transform: scale(0.94); }

/* ---------- PWA widgets (restyled) ---------- */
.pwa-install-prompt {
    position: fixed;
    bottom: 1.25rem;
    left: 1.25rem;
    z-index: var(--z-toast);
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 1rem 1.15rem;
    max-width: 20rem;
    color: var(--ink-2);
    box-shadow: 0 20px 60px oklch(5% 0.01 170 / 0.55);
    transform: translateY(150%);
    transition: transform var(--dur-slow) var(--ease-out-expo);
}
.pwa-install-prompt.show { transform: translateY(0); }
.pwa-install-prompt .close-btn {
    position: absolute;
    top: 0.4rem; right: 0.6rem;
    background: none; border: none;
    color: var(--ink-3);
    font-size: 1.1rem;
    cursor: pointer;
}
.pwa-install-prompt .install-btn {
    background: var(--phosphor);
    color: var(--on-accent);
    border: none;
    padding: 0.55em 1.1em;
    margin-top: 0.7rem;
    border-radius: 9px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
}

.offline-indicator {
    position: fixed;
    top: 4.5rem; right: 1.25rem;
    z-index: var(--z-toast);
    background: oklch(45% 0.16 25);
    color: oklch(97% 0.01 25);
    padding: 0.45em 0.9em;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: var(--text-mono-sm);
    display: none;
}
.offline-indicator.show { display: block; }

.update-notification {
    position: fixed;
    top: 4.5rem; left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    background: var(--bg-elev);
    border: 1px solid var(--amber-soft);
    border-radius: 10px;
    padding: 0.7rem 1.1rem;
    color: var(--amber);
    font-family: var(--font-mono);
    font-size: var(--text-mono-sm);
    display: none;
}
.update-notification.show { display: block; }
.update-notification .update-btn {
    background: var(--amber);
    color: var(--on-accent);
    border: none;
    padding: 0.35em 0.9em;
    margin-left: 0.7rem;
    border-radius: 7px;
    font-family: var(--font-display);
    font-weight: 600;
    cursor: pointer;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; }
    .about-card { position: static; max-width: 30rem; }
    .writing-grid { grid-template-columns: 1fr; }
    .project-flagship { grid-template-columns: 1fr; align-items: start; }
    .scroll-cue { display: none; }
}

@media (max-width: 720px) {
    .nav-links { display: none; }
    .site-nav { gap: var(--space-sm); }
    .site-nav .nav-actions { margin-left: auto; }
    .hero { padding-top: 6rem; }
    .hero-lede { font-size: 1.0625rem; }
    .hero-status { font-size: 0.6875rem; }
    .proof-strip {
        column-gap: 1.5rem;
        font-size: 0.6875rem;
    }
    .stack-group { grid-template-columns: 1fr; gap: 0.6rem; }
    .quote:nth-child(2) { margin-left: 0; }
    .timeline-rail { display: none; }
    .timeline-item { padding-left: 0; }
    .timeline-item::before { display: none; }
    .chat-panel {
        right: 0; bottom: 0; left: 0;
        width: 100%;
        height: min(34rem, 82svh);
        border-radius: 16px 16px 0 0;
        border-left: none; border-right: none; border-bottom: none;
    }
    .contact { text-align: left; }
    .contact .path-marker { text-align: left; }
    .contact-headline, .contact-lede { margin-left: 0; }
    .contact-cta { justify-content: flex-start; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .status-dot, .wordmark-cursor { animation: none; opacity: 1; }
    .scroll-cue-line::after { animation: none; opacity: 0; }
}

/* ---------- Light theme: hardcoded-color translations ---------- */
/* Every rule above that bakes a literal dark value gets its daylight twin here. */
[data-theme="light"] #constellation {
    background:
        radial-gradient(120% 90% at 75% 10%, oklch(92% 0.03 165 / 0.5) 0%, transparent 55%),
        radial-gradient(90% 70% at 15% 85%, oklch(93% 0.03 90 / 0.4) 0%, transparent 60%);
}
[data-theme="light"] .site-nav.scrolled {
    background: oklch(95.5% 0.008 170 / 0.82);
}
[data-theme="light"] .about-card {
    box-shadow: 0 24px 60px oklch(35% 0.02 170 / 0.16);
}
[data-theme="light"] .project::after {
    background: radial-gradient(280px circle at var(--gx, 50%) var(--gy, 50%),
        oklch(52% 0.14 155 / 0.1), transparent 68%);
}
[data-theme="light"] .project:hover {
    box-shadow: 0 18px 48px oklch(35% 0.02 170 / 0.13);
}
[data-theme="light"] .project-grid .project-closer {
    background:
        radial-gradient(70% 130% at 12% 0%, oklch(55% 0.12 85 / 0.07) 0%, transparent 55%),
        var(--bg-elev);
}
[data-theme="light"] .chip:active {
    box-shadow: inset 0 1px 3px oklch(35% 0.02 170 / 0.28);
}
[data-theme="light"] .chip-expert {
    border-color: oklch(46% 0.11 152 / 0.4);
}
[data-theme="light"] .chat-fab {
    box-shadow: 0 10px 34px oklch(35% 0.02 170 / 0.16);
}
[data-theme="light"] .chat-panel {
    box-shadow: 0 30px 80px oklch(35% 0.02 170 / 0.2);
}
[data-theme="light"] .chat-msg-user {
    border-color: oklch(46% 0.11 152 / 0.35);
}
[data-theme="light"] .chat-msg-error {
    border-color: oklch(52% 0.19 25 / 0.5);
    color: oklch(45% 0.16 25);
}
[data-theme="light"] .pwa-install-prompt {
    box-shadow: 0 20px 60px oklch(35% 0.02 170 / 0.18);
}