/* ============================================================
   Marcus Loo — terminal / IDE design system
   ============================================================ */

/* ---- Tokens ------------------------------------------------ */

:root {
    --bg: #0b0b0c;
    --panel: #101012;
    --panel-2: #16161a;
    --panel-3: #1c1c22;

    --line: #26262d;
    --line-2: #35353f;

    --fg: #eff0f2;
    --fg-1: #a5a6b0;
    --fg-2: #6c6d78;

    --accent: #c6ff3d;
    --accent-solid: #c6ff3d;
    --accent-ink: #0b0b0c;
    --accent-soft: rgb(198 255 61 / 10%);
    --accent-line: rgb(198 255 61 / 35%);

    --amber: #ffb454;
    --amber-soft: rgb(255 180 84 / 12%);

    --grid: rgb(255 255 255 / 3.5%);
    --hard: var(--accent);

    --nav-h: 3.5rem;
    --status-h: 1.75rem;
    --radius: 0;

    --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    --sans: "Inter Tight", "Inter", system-ui, -apple-system, sans-serif;

    --ease: cubic-bezier(0.2, 0.7, 0.2, 1);

    color-scheme: dark;
}

[data-theme="light"] {
    --bg: #f4f4f1;
    --panel: #fff;
    --panel-2: #ecece8;
    --panel-3: #e2e2dd;

    --line: #dcdcd6;
    --line-2: #c2c2ba;

    --fg: #111114;
    --fg-1: #52535d;
    --fg-2: #82838d;

    --accent: #4c7a00;
    --accent-solid: #c6ff3d;
    --accent-ink: #111114;
    --accent-soft: rgb(76 122 0 / 8%);
    --accent-line: rgb(76 122 0 / 30%);

    --amber: #b45309;
    --amber-soft: rgb(180 83 9 / 10%);

    --grid: rgb(0 0 0 / 4.5%);
    --hard: #111114;

    color-scheme: light;
}

/* ---- Reset ------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 2rem);
    -webkit-text-size-adjust: 100%;
}

body {
    min-height: 100vh;
    padding-bottom: var(--status-h);
    background: var(--bg);
    color: var(--fg-1);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    transition: background-color 0.25s var(--ease), color 0.25s var(--ease);
    overflow-x: hidden;
}

/* Faint engineering grid behind everything. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 4rem 4rem;
    mask-image: radial-gradient(ellipse 90% 55% at 50% 0%, #000 10%, transparent 80%);
    pointer-events: none;
}

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

/* Author `display` above outranks the UA sheet's [hidden] rule, so the theme
   toggle's icons both stayed visible. Restore hidden for everything. */
[hidden] {
    display: none !important;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

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

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--line-2);
    border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--fg-2);
}

/* ---- Typography -------------------------------------------- */

h1,
h2,
h3 {
    color: var(--fg);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.mono {
    font-family: var(--mono);
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 100;
    padding: 0.6rem 1rem;
    background: var(--accent-solid);
    color: var(--accent-ink);
    font-family: var(--mono);
    font-size: 0.75rem;
}

.skip-link:focus {
    top: 0.75rem;
}

/* ---- Layout ------------------------------------------------ */

.wrap {
    width: 100%;
    max-width: 72rem;
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.section {
    padding-block: 5.5rem;
}

@media (max-width: 40rem) {
    .section {
        padding-block: 3.5rem;
    }
}

/* ---- Section headers --------------------------------------- */

.sec-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.sec-idx {
    flex: none;
    padding: 0.2rem 0.45rem;
    border: 1px solid var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
}

.sec-head h2 {
    flex: none;
    font-family: var(--mono);
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.sec-rule {
    flex: 1;
    height: 1px;
    min-width: 1rem;
    background: var(--line);
}

.sec-path {
    flex: none;
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.75rem;
}

@media (max-width: 40rem) {
    .sec-path {
        display: none;
    }
}

/* ---- Nav --------------------------------------------------- */

.nav {
    position: fixed;
    inset: 0 0 auto;
    z-index: 50;
    height: var(--nav-h);
    border-bottom: 1px solid transparent;
    transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.nav.is-stuck {
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: var(--line);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-family: var(--mono);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--fg);
    letter-spacing: -0.01em;
}

.brand-mark {
    width: 0.55rem;
    height: 1.05rem;
    background: var(--accent-solid);
    animation: blink 1.2s steps(1) infinite;
}

.brand-slash {
    color: var(--fg-2);
    font-weight: 400;
}

@keyframes blink {
    50% {
        opacity: 0.25;
    }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    padding: 0.4rem 0.6rem;
    color: var(--fg-1);
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid transparent;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background-color 0.15s var(--ease);
}

.nav-link i {
    color: var(--fg-2);
    font-style: normal;
    font-size: 0.65rem;
    transition: color 0.15s var(--ease);
}

.nav-link:hover {
    color: var(--fg);
    background: var(--panel-2);
}

.nav-link.is-active {
    color: var(--accent);
    border-color: var(--accent-line);
    background: var(--accent-soft);
}

.nav-link.is-active i {
    color: var(--accent);
}

.nav-tools {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 2.1rem;
    height: 2.1rem;
    border: 1px solid var(--line);
    color: var(--fg-1);
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background-color 0.15s var(--ease);
}

.icon-btn:hover {
    color: var(--accent);
    border-color: var(--accent-line);
    background: var(--accent-soft);
}

.icon-btn svg {
    width: 1rem;
    height: 1rem;
}

.nav-burger {
    display: none;
}

/* Mobile drawer */
.nav-drawer {
    position: absolute;
    inset: var(--nav-h) 0 auto;
    display: none;
    padding: 0.5rem 1.5rem 1.25rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
}

.nav-drawer.is-open {
    display: block;
}

.nav-drawer .nav-link {
    padding: 0.7rem 0.5rem;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--line);
}

@media (max-width: 56rem) {
    .nav-links {
        display: none;
    }

    .nav-burger {
        display: grid;
    }
}

/* ---- Status bar -------------------------------------------- */

.statusbar {
    position: fixed;
    inset: auto 0 0;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 0;
    height: var(--status-h);
    padding-right: 0.75rem;
    background: var(--panel);
    border-top: 1px solid var(--line);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.sb-mode {
    padding: 0 0.75rem;
    height: 100%;
    display: flex;
    align-items: center;
    background: var(--accent-solid);
    color: var(--accent-ink);
    font-weight: 700;
}

.sb-item {
    padding: 0 0.75rem;
    border-right: 1px solid var(--line);
    height: 100%;
    display: flex;
    align-items: center;
}

.sb-item.accent {
    color: var(--accent);
}

.sb-spacer {
    flex: 1;
}

.sb-right {
    padding-left: 0.75rem;
    border-left: 1px solid var(--line);
    height: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

@media (max-width: 48rem) {
    .sb-hide {
        display: none;
    }
}

/* ---- Buttons ----------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.1rem;
    border: 1px solid var(--line-2);
    background: var(--panel);
    color: var(--fg);
    font-family: var(--mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: transform 0.12s var(--ease), box-shadow 0.12s var(--ease),
        border-color 0.12s var(--ease), background-color 0.12s var(--ease), color 0.12s var(--ease);
}

.btn svg {
    width: 0.95rem;
    height: 0.95rem;
    flex: none;
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 3px 3px 0 var(--hard);
    border-color: var(--hard);
}

.btn:active {
    transform: translate(0, 0);
    box-shadow: 0 0 0 var(--hard);
}

.btn-primary {
    background: var(--accent-solid);
    border-color: var(--accent-solid);
    color: var(--accent-ink);
    font-weight: 700;
}

.btn-primary:hover {
    box-shadow: 3px 3px 0 var(--fg);
    border-color: var(--accent-solid);
}

/* ---- Chips ------------------------------------------------- */

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--line);
    background: var(--panel-2);
    color: var(--fg-1);
    font-family: var(--mono);
    font-size: 0.7rem;
    line-height: 1.5;
    white-space: nowrap;
}

.chip-accent {
    border-color: var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
}

.chip-live {
    border-color: var(--amber);
    background: var(--amber-soft);
    color: var(--amber);
    font-weight: 700;
}

.chip-live::before {
    content: "";
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: currentcolor;
    animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
    50% {
        opacity: 0.25;
    }
}

/* ---- Panels ------------------------------------------------ */

.panel {
    border: 1px solid var(--line);
    background: var(--panel);
}

.panel-hover {
    transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease), border-color 0.15s var(--ease);
}

.panel-hover:hover {
    transform: translate(-3px, -3px);
    box-shadow: 4px 4px 0 var(--hard);
    border-color: var(--hard);
}

/* ---- Hero -------------------------------------------------- */

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3.5rem;
    min-height: 100vh;
    padding-block: calc(var(--nav-h) + 3rem) 4rem;
}

@media (max-width: 62rem) {
    .hero {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        min-height: auto;
        padding-block: calc(var(--nav-h) + 2.5rem) 3rem;
    }
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-kicker::before {
    content: "";
    width: 1.75rem;
    height: 1px;
    background: var(--accent);
}

.hero h1 {
    font-size: clamp(2.75rem, 8vw, 4.75rem);
    font-weight: 700;
    letter-spacing: -0.045em;
    margin-bottom: 0.75rem;
}

.hero-build {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.75rem;
    font-family: var(--mono);
    font-size: clamp(1rem, 2.6vw, 1.35rem);
    color: var(--fg-2);
}

.hero-build .kw {
    color: var(--fg-1);
}

#typewriter {
    color: var(--accent);
    font-weight: 500;
}

.caret {
    display: inline-block;
    width: 0.55ch;
    background: var(--accent);
    color: transparent;
    animation: blink 1.1s steps(1) infinite;
}

.hero-lede {
    max-width: 34rem;
    margin-bottom: 2.25rem;
    font-size: 1.0625rem;
    color: var(--fg-1);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--fg-2);
}

.hero-meta b {
    display: block;
    color: var(--fg);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ---- Terminal ---------------------------------------------- */

/* A terminal is a terminal: it stays dark in both themes, and doubles as the
   contrast anchor on the paper theme. Re-scoping the tokens does the work. */
.term,
.code {
    --panel: #101012;
    --panel-2: #16161a;
    --line: #26262d;
    --line-2: #35353f;
    --fg: #eff0f2;
    --fg-1: #a5a6b0;
    --fg-2: #6c6d78;
    --accent: #c6ff3d;
    --amber: #ffb454;
}

.term {
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: 0 1.5rem 3rem -1.5rem rgb(0 0 0 / 45%);
}

.term-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.85rem;
    background: var(--panel-2);
    border-bottom: 1px solid var(--line);
}

.term-dots {
    display: flex;
    gap: 0.35rem;
}

.term-dots span {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    background: var(--line-2);
}

.term-dots span:first-child {
    background: #ff5f57;
}

.term-dots span:nth-child(2) {
    background: #febc2e;
}

.term-dots span:nth-child(3) {
    background: #28c840;
}

.term-title {
    flex: 1;
    text-align: center;
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.72rem;
}

.term-tag {
    padding: 0.1rem 0.35rem;
    border: 1px solid var(--line);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.62rem;
    text-transform: uppercase;
}

.term-body {
    padding: 1.25rem;
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.9;
    min-height: 19rem;
    overflow-x: auto;
}

@media (max-width: 30rem) {
    .term-body {
        font-size: 0.72rem;
        padding: 1rem;
    }
}

.term-line {
    white-space: nowrap;
}

.term-prompt {
    color: var(--accent);
    font-weight: 700;
    user-select: none;
}

.term-dir {
    color: var(--fg-2);
    user-select: none;
}

.term-cmd {
    color: var(--fg);
}

.term-out {
    color: var(--fg-1);
    white-space: nowrap;
}

.term-out::before {
    content: "→ ";
    color: var(--fg-2);
}

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

/* Rows are hidden only when JS is present to type them back in;
   without JS the transcript renders in full. */
.js .term-line,
.js .term-out {
    visibility: hidden;
}

.js .term-line.is-shown,
.js .term-out.is-shown {
    visibility: visible;
}

/* ---- About ------------------------------------------------- */

.about {
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 62rem) {
    .about {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.prose p + p {
    margin-top: 1.1rem;
}

.prose {
    font-size: 1.0625rem;
}

.spec {
    font-family: var(--mono);
    font-size: 0.78rem;
}

.spec-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.9rem;
    background: var(--panel-2);
    border-bottom: 1px solid var(--line);
    color: var(--fg-2);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.spec-row {
    display: grid;
    grid-template-columns: 7rem 1fr;
    gap: 0.75rem;
    padding: 0.65rem 0.9rem;
    border-bottom: 1px solid var(--line);
}

.spec-row:last-child {
    border-bottom: 0;
}

.spec-key {
    color: var(--fg-2);
}

.spec-key::before {
    content: "$ ";
    color: var(--accent);
}

.spec-val {
    color: var(--fg);
    word-break: break-word;
}

/* ---- Experience -------------------------------------------- */

.exp {
    border: 1px solid var(--line);
    background: var(--panel);
}

.exp-item {
    border-bottom: 1px solid var(--line);
}

.exp-item:last-child {
    border-bottom: 0;
}

.exp-toggle {
    display: grid;
    grid-template-columns: 2.75rem 1fr auto;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1.35rem 1.25rem;
    text-align: left;
    transition: background-color 0.15s var(--ease);
}

.exp-toggle:hover {
    background: var(--panel-2);
}

.exp-idx {
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.75rem;
    transition: color 0.15s var(--ease);
}

.exp-toggle:hover .exp-idx,
.exp-toggle[aria-expanded="true"] .exp-idx {
    color: var(--accent);
}

.exp-role {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.65rem;
    color: var(--fg);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.exp-at {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.85rem;
    font-weight: 500;
}

.exp-when {
    display: block;
    margin-top: 0.2rem;
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.72rem;
}

.exp-chev {
    width: 1.15rem;
    height: 1.15rem;
    color: var(--fg-2);
    transition: transform 0.25s var(--ease), color 0.15s var(--ease);
}

.exp-toggle[aria-expanded="true"] .exp-chev {
    transform: rotate(180deg);
    color: var(--accent);
}

.exp-body {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s var(--ease);
}

.exp-body[data-open="true"] {
    grid-template-rows: 1fr;
}

.exp-body > div {
    overflow: hidden;
}

.exp-list {
    padding: 0 1.25rem 1.5rem 5.75rem;
}

@media (max-width: 40rem) {
    .exp-list {
        padding-left: 1.25rem;
    }

    .exp-toggle {
        grid-template-columns: 1.9rem 1fr auto;
        gap: 0.6rem;
        padding-inline: 1rem;
    }
}

.exp-list li {
    position: relative;
    padding-left: 1.35rem;
    color: var(--fg-1);
    font-size: 0.95rem;
}

.exp-list li + li {
    margin-top: 0.6rem;
}

.exp-list li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-family: var(--mono);
}

/* ---- Stack grid -------------------------------------------- */

.stack-groups {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.stack {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

@media (max-width: 62rem) {
    .stack {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 30rem) {
    .stack {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stack-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem 0.75rem;
    background: var(--panel);
    transition: background-color 0.15s var(--ease);
}

.stack-cell:hover {
    background: var(--panel-2);
}

.stack-cell img {
    width: 2rem;
    height: 2rem;
    object-fit: contain;
    filter: grayscale(0.55);
    opacity: 0.9;
    transition: filter 0.2s var(--ease), opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.stack-cell:hover img {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}

/* Monochrome icons need to flip with the theme to stay visible. */
[data-theme="dark"] .stack-cell img.mono-icon {
    filter: grayscale(0.55) invert(1) brightness(1.7);
}

[data-theme="dark"] .stack-cell:hover img.mono-icon {
    filter: invert(1) brightness(1.7);
}

.stack-cell span {
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.7rem;
    text-align: center;
    transition: color 0.15s var(--ease);
}

.stack-cell:hover span {
    color: var(--fg);
}

/* ---- Project cards ----------------------------------------- */

.proj-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(24rem, 1fr));
    gap: 1.25rem;
}

/* Ghost tile that closes out the project row and doubles as the "see all" link. */
.proj-more {
    display: grid;
    place-items: center;
    align-content: center;
    gap: 0.75rem;
    min-height: 14rem;
    padding: 2rem;
    border: 1px dashed var(--line-2);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.8rem;
    text-align: center;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background-color 0.15s var(--ease);
}

.proj-more:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-soft);
}

.proj-more svg {
    width: 1.5rem;
    height: 1.5rem;
}

.proj {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    background: var(--panel);
}

.proj-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    background: var(--panel-2);
    border-bottom: 1px solid var(--line);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.7rem;
}

.proj-head .file {
    color: var(--fg-1);
}

.proj-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 0.85rem;
    padding: 1.35rem 1.25rem;
}

.proj h3 {
    font-size: 1.2rem;
    transition: color 0.15s var(--ease);
}

.proj:hover h3 {
    color: var(--accent);
}

.proj-sub {
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 0.3rem;
}

.proj-desc {
    font-size: 0.92rem;
}

.proj-points {
    display: grid;
    gap: 0.4rem;
    margin-top: auto;
}

.proj-points li {
    position: relative;
    padding-left: 1.2rem;
    color: var(--fg-1);
    font-size: 0.85rem;
    line-height: 1.5;
}

.proj-points li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-family: var(--mono);
}

.proj-foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    padding: 0.85rem 1.25rem;
    border-top: 1px solid var(--line);
}

.proj-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.7rem;
    border: 1px solid var(--line-2);
    color: var(--fg-1);
    font-family: var(--mono);
    font-size: 0.72rem;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background-color 0.15s var(--ease);
}

.link-btn svg {
    width: 0.85rem;
    height: 0.85rem;
    flex: none;
}

.link-btn:hover {
    color: var(--accent);
    border-color: var(--accent-line);
    background: var(--accent-soft);
}

/* ---- Contact ----------------------------------------------- */

.contact {
    padding: 3.5rem 2rem;
    text-align: center;
    border: 1px solid var(--line);
    background: var(--panel);
    background-image: radial-gradient(circle at 50% 0%, var(--accent-soft), transparent 65%);
}

.contact h2 {
    font-size: clamp(1.9rem, 5vw, 2.75rem);
    margin-bottom: 1rem;
}

.contact p {
    max-width: 38rem;
    margin: 0 auto 2rem;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.contact-cmd {
    display: inline-block;
    margin-bottom: 1.25rem;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.8rem;
}

/* ---- Footer ------------------------------------------------ */

.footer {
    border-top: 1px solid var(--line);
    background: var(--panel);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-block: 1.75rem;
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.72rem;
}

.footer a:hover {
    color: var(--accent);
}

/* ---- Toast ------------------------------------------------- */

.toast {
    position: fixed;
    left: 50%;
    bottom: calc(var(--status-h) + 1.25rem);
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    background: var(--accent-solid);
    color: var(--accent-ink);
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 4px 4px 0 var(--fg);
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, 0.75rem);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.toast.is-shown {
    opacity: 1;
    transform: translate(-50%, 0);
}

.toast svg {
    width: 0.9rem;
    height: 0.9rem;
}

/* ---- Code block -------------------------------------------- */

.code {
    border: 1px solid var(--line);
    background: var(--panel);
}

.code-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.9rem;
    background: var(--panel-2);
    border-bottom: 1px solid var(--line);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.7rem;
}

.code pre {
    margin: 0;
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.78rem;
    line-height: 1.8;
    color: var(--fg-1);
    tab-size: 4;
}

.code .t-key {
    color: var(--accent);
}

.code .t-cls {
    color: var(--fg);
    font-weight: 700;
}

.code .t-var {
    color: var(--amber);
}

.code .t-str {
    color: var(--fg);
}

.code .t-com {
    color: var(--fg-2);
    font-style: italic;
}

/* ---- Case study: capabilities ------------------------------ */

/* Fixed track count so the six capabilities always fill whole rows —
   an auto-fill grid leaves the divider background showing through. */
.cap-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

@media (max-width: 62rem) {
    .cap-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 40rem) {
    .cap-grid {
        grid-template-columns: 1fr;
    }
}

.cap {
    padding: 1.5rem 1.35rem;
    background: var(--panel);
    transition: background-color 0.15s var(--ease);
}

.cap:hover {
    background: var(--panel-2);
}

.cap-idx {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.7rem;
}

.cap h3 {
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.cap p {
    font-size: 0.88rem;
    color: var(--fg-1);
}

/* ---- Case study: before / after ----------------------------- */

.ba {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 48rem) {
    .ba {
        grid-template-columns: 1fr;
    }
}

.ba-col {
    border: 1px solid var(--line);
    background: var(--panel);
}

.ba-head {
    padding: 0.6rem 1rem;
    background: var(--panel-2);
    border-bottom: 1px solid var(--line);
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.ba-col.is-after .ba-head {
    color: var(--accent);
}

.ba-list {
    padding: 1.25rem;
    display: grid;
    gap: 0.7rem;
}

.ba-list li {
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.92rem;
}

.ba-list li::before {
    position: absolute;
    left: 0;
    font-family: var(--mono);
    font-weight: 700;
}

.is-before .ba-list li::before {
    content: "\2717";
    color: var(--fg-2);
}

.is-after .ba-list li::before {
    content: "\2713";
    color: var(--accent);
}

/* ---- Case study: impact stats ------------------------------ */

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

@media (max-width: 62rem) {
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 30rem) {
    .stats {
        grid-template-columns: 1fr;
    }
}

.stat {
    padding: 1.75rem 1.35rem;
    background: var(--panel);
}

.stat b {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--accent);
    font-family: var(--mono);
    font-size: clamp(1.4rem, 3.5vw, 1.9rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.stat span {
    color: var(--fg-1);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ---- Case study: problem list ------------------------------ */

.prob {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

@media (max-width: 62rem) {
    .prob {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 40rem) {
    .prob {
        grid-template-columns: 1fr;
    }
}

.prob li {
    display: flex;
    gap: 0.75rem;
    padding: 1.1rem 1.25rem;
    background: var(--panel);
    color: var(--fg-1);
    font-size: 0.92rem;
}

.prob li::before {
    content: "!";
    flex: none;
    display: grid;
    place-items: center;
    width: 1.15rem;
    height: 1.15rem;
    margin-top: 0.2rem;
    border: 1px solid var(--amber);
    color: var(--amber);
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
}

/* ---- Not found --------------------------------------------- */

.nf {
    display: grid;
    place-items: center;
    min-height: calc(100vh - var(--status-h));
    padding-block: calc(var(--nav-h) + 3rem) 4rem;
    text-align: center;
}

.nf-code {
    font-family: var(--mono);
    font-size: clamp(4rem, 18vw, 8rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.05em;
    color: var(--fg);
}

.nf-code span {
    color: var(--accent);
}

/* ---- Reveal ------------------------------------------------ */

.reveal {
    opacity: 0;
    transform: translateY(0.75rem);
    transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.reveal.is-in {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }

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

/* ---- Utilities --------------------------------------------- */

.page-head {
    padding-block: calc(var(--nav-h) + 4rem) 0;
}

.page-head h1 {
    font-size: clamp(2.25rem, 6vw, 3.5rem);
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
}

.page-head .lede {
    max-width: 40rem;
    font-size: 1.05rem;
}

.crumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    color: var(--fg-2);
    font-family: var(--mono);
    font-size: 0.75rem;
}

.crumbs a:hover {
    color: var(--accent);
}

.crumbs .sep {
    color: var(--line-2);
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.divider {
    height: 1px;
    background: var(--line);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}