/* Eric Rau portfolio — light engineering portfolio system */
:root {
  --paper: #ffffff;
  --paper-bright: #ffffff;
  --paper-deep: #f5f5f5;
  --ink: #505050;
  --ink-soft: #686868;
  --ink-faint: #888888;
  --night: #505861;
  --night-soft: #626b74;
  --copper: #f0a030;
  --copper-dark: #d98524;
  --copper-wash: #ffe0aa;
  --sage: #b5d2ec;
  --blue: #8ebee0;
  --line: rgba(80, 80, 80, 0.17);
  --line-light: rgba(80, 80, 80, 0.14);
  --shadow: 0 16px 46px rgba(70, 82, 94, 0.09);
  --accent-gradient: linear-gradient(135deg, #ffb741 0%, #f0a030 34%, #b5d2ec 68%, #8ebee0 100%);
  --accent-wash: linear-gradient(135deg, rgba(255, 183, 65, .14), rgba(142, 190, 224, .2));
  --sans: Inter, Montserrat, "Segoe UI", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --max: 1320px;
  --gutter: clamp(20px, 4vw, 64px);
  --section: clamp(88px, 11vw, 168px);
  --ease: cubic-bezier(.2, .75, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; background: var(--paper); }
body { margin: 0; overflow-x: clip; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; font-weight: 400; line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
figure, blockquote, p, h1, h2, h3 { margin-top: 0; }
h1, h2, h3 { font-weight: 500; letter-spacing: -.035em; line-height: 1.05; text-wrap: balance; }
h1 { font-size: clamp(3.4rem, 7.8vw, 8.4rem); }
h2 { font-size: clamp(2.45rem, 5vw, 5.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.85rem); letter-spacing: -.025em; }
p { color: var(--ink-soft); text-wrap: pretty; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
button, select, input { font: inherit; }
button { color: inherit; }
::selection { background: var(--sage); color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }

.shell { width: min(100%, var(--max)); margin-inline: auto; padding-inline: var(--gutter); }
.skip-link { position: fixed; z-index: 1000; left: 16px; top: 12px; padding: 10px 14px; background: var(--ink); color: #fff; transform: translateY(-160%); transition: transform .2s; }
.skip-link:focus { transform: translateY(0); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.tbd { color: var(--copper-dark); font-family: var(--mono); font-size: .85rem; }

.site-header { position: relative; z-index: 50; border-bottom: 1px solid rgba(80,80,80,.1); background: rgba(255,255,255,.9); backdrop-filter: blur(16px); }
.site-header.is-sticky { position: sticky; top: 0; }
.header-inner { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.identity { display: inline-flex; align-items: center; gap: 13px; text-decoration: none; }
.identity-mark { width: 42px; aspect-ratio: 1; display: grid; place-items: center; background: var(--ink); color: var(--paper-bright); border-radius: 2px; font: 600 .72rem/1 var(--mono); letter-spacing: .08em; }
.identity-copy { display: grid; line-height: 1.15; }
.identity-copy strong { font-size: .94rem; font-weight: 650; }
.identity-copy small { margin-top: 5px; color: var(--ink-faint); font: .65rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.primary-nav { display: flex; align-items: center; gap: clamp(18px, 3vw, 44px); }
.primary-nav a { position: relative; padding: 14px 0; color: var(--ink-soft); font-size: .9rem; font-weight: 400; text-decoration: none; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 7px; height: 2px; background: var(--accent-gradient); transition: right .25s var(--ease); }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--ink); }
.primary-nav a:hover::after, .primary-nav a[aria-current="page"]::after { right: 0; }
.menu-button { display: none; border: 0; background: transparent; padding: 12px 0; cursor: pointer; }
.menu-button i, .menu-button i::after { display: block; width: 25px; height: 1px; background: currentColor; transition: transform .25s; }
.menu-button i::after { content: ""; transform: translateY(7px); }
.menu-button[aria-expanded="true"] i { transform: translateY(3px) rotate(45deg); }
.menu-button[aria-expanded="true"] i::after { transform: rotate(-90deg); }
.menu-button span { position: absolute; width: 1px; height: 1px; overflow: hidden; }

.kicker, .section-label { margin-bottom: 24px; color: var(--ink-faint); font: 600 .72rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .12em; }
.kicker span { display: inline-block; margin-right: 10px; color: var(--copper); }
.hero { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; padding-top: clamp(74px, 10vw, 138px); padding-bottom: clamp(72px, 8vw, 114px); }
.hero-copy { grid-column: 1 / span 7; position: relative; z-index: 2; }
.hero h1 { max-width: 900px; margin-bottom: 34px; font-size: clamp(3.4rem, 4.9vw, 5.2rem); }
h1 em, h2 em { color: transparent; background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; font-style: normal; }
.hero-lede { max-width: 720px; margin-bottom: 38px; font-size: clamp(1.08rem, 1.55vw, 1.35rem); line-height: 1.55; }
.button-row { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.button { display: inline-flex; justify-content: space-between; align-items: center; gap: 36px; min-height: 52px; padding: 13px 20px; border: 1px solid var(--ink); border-radius: 6px; font-size: .8rem; font-weight: 500; letter-spacing: .02em; text-decoration: none; transition: background .22s, color .22s, transform .22s, border-color .22s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink); color: #fff; }
.button-primary:hover { background: var(--blue); border-color: var(--blue); }
.button-secondary { background: transparent; }
.button-secondary:hover { background: var(--ink); color: #fff; }
.text-link { display: inline-flex; gap: 12px; align-items: center; color: var(--ink); font-size: .83rem; font-weight: 650; text-decoration-color: var(--copper); }
.text-link span { color: var(--copper); transition: transform .2s; }
.text-link:hover span { transform: translateX(4px); }
.hero-figure { grid-column: 8 / -1; margin: 76px 0 0; align-self: start; overflow: hidden; background: var(--paper-bright); border: 1px solid rgba(80,80,80,.1); border-radius: 12px; box-shadow: var(--shadow); }
.hero-figure img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: center; filter: saturate(.88) brightness(1.02) contrast(.98); }
.hero-figure figcaption { display: flex; justify-content: space-between; gap: 20px; padding: 14px 16px; color: var(--ink-faint); font: .6rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.hero-index { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 62px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-index > div { display: grid; grid-template-columns: auto 1fr; align-items: baseline; gap: 16px; padding: 22px 24px 22px 0; }
.hero-index > div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.hero-index b { color: transparent; background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; font: 500 2.1rem/1 var(--mono); }
.hero-index span { max-width: 150px; color: var(--ink-faint); font-size: .72rem; line-height: 1.35; }

.edition-note { display: grid; grid-template-columns: 2fr 7fr 2fr; align-items: start; gap: 48px; padding-top: 58px; padding-bottom: 58px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.edition-note h2 { max-width: 820px; margin-bottom: 22px; font-size: clamp(1.9rem, 3.1vw, 3.35rem); line-height: 1.1; }
.edition-note p:not(.section-label) { max-width: 720px; margin: 0; }
.edition-note > .text-link { justify-self: end; margin-top: 4px; }

.work-section, .expertise-section, .practice-section, .credentials-section { padding-top: var(--section); padding-bottom: var(--section); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(260px, .55fr); align-items: end; gap: 64px; margin-bottom: clamp(48px, 7vw, 88px); }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { max-width: 500px; margin-bottom: 6px; }
.project-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(40px, 6vw, 82px) 24px; }
.project-card { grid-column: span 6; min-width: 0; color: inherit; text-decoration: none; }
.project-card:nth-child(3n+1) { grid-column: span 7; }
.project-card:nth-child(3n+2) { grid-column: span 5; }
.project-card:nth-child(3n+3) { grid-column: 4 / span 7; }
.project-card-media { position: relative; overflow: hidden; aspect-ratio: 16 / 10; background: var(--paper-deep); border: 1px solid rgba(80,80,80,.12); border-radius: 12px; }
.project-card-media::after { content: ""; position: absolute; z-index: 2; inset: 0; pointer-events: none; background: linear-gradient(135deg, rgba(255,183,65,.11), rgba(181,210,236,.08) 55%, rgba(142,190,224,.16)); mix-blend-mode: soft-light; }
.project-card-media img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(.08) saturate(.78) brightness(1.035) contrast(.97); transition: transform .65s var(--ease), filter .4s; }
.project-card:hover .project-card-media img { transform: scale(1.025); filter: grayscale(0) saturate(.94) brightness(1.02) contrast(.99); }
.project-card-visual { position: absolute; inset: 0; display: grid; grid-template-columns: 1.15fr .85fr; padding: clamp(22px, 4vw, 52px); background: var(--night); color: #fff; overflow: hidden; }
.project-card-visual::before { content: ""; position: absolute; inset: 10% -10% auto 48%; height: 1px; background: color-mix(in srgb, var(--copper) 70%, white); box-shadow: 0 48px 0 rgba(255,255,255,.12), 0 96px 0 rgba(255,255,255,.08), 0 144px 0 rgba(255,255,255,.06); transform: rotate(-8deg); }
.project-card-visual::after { content: ""; position: absolute; width: 46%; aspect-ratio: 1; right: -8%; bottom: -26%; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; box-shadow: 0 0 0 28px rgba(255,255,255,.035), 0 0 0 56px rgba(255,255,255,.025); }
.project-card-visual span { position: relative; z-index: 1; align-self: end; color: rgba(255,255,255,.72); font: 600 .65rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.project-card-visual b { position: relative; z-index: 1; align-self: start; justify-self: end; color: var(--copper-wash); font: 400 clamp(2rem, 5vw, 5rem)/1 var(--mono); }
.project-card-media .status-tag { position: absolute; z-index: 3; left: 16px; top: 16px; padding: 7px 9px; background: rgba(255,255,255,.92); color: var(--copper-dark); border-radius: 5px; font: 600 .6rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.project-card-body { padding-top: 22px; border-top: 2px solid transparent; transition: border-color .25s; }
.project-card:hover .project-card-body { border-color: var(--blue); }
.project-card-meta { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 15px; color: var(--ink-faint); font: .62rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.project-card h3 { max-width: 680px; margin-bottom: 14px; font-size: clamp(1.55rem, 2.8vw, 2.7rem); line-height: 1.07; }
.project-card p { max-width: 680px; margin-bottom: 18px; font-size: .92rem; }
.project-card-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding-top: 15px; border-top: 1px solid var(--line); }
.project-card-footer span { color: var(--ink-faint); font: .61rem/1.45 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.project-card-footer b { color: var(--copper); font-weight: 500; }
.section-end { display: flex; justify-content: flex-end; margin-top: 76px; }

.impact-section { padding-top: var(--section); padding-bottom: var(--section); background: var(--paper-deep); color: var(--ink); }
.section-heading.light .section-label, .section-heading.light > p { color: var(--ink-faint); }
.section-heading.light h2 { color: var(--ink); }
.impact-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.impact-grid article { padding: 36px 30px 32px 0; }
.impact-grid article + article { padding-left: 30px; border-left: 1px solid var(--line-light); }
.impact-grid b { display: block; margin-bottom: 48px; color: transparent; background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; font: 450 clamp(2.6rem, 5vw, 5.2rem)/1 var(--mono); letter-spacing: -.08em; }
.impact-grid h3 { margin-bottom: 12px; color: var(--ink); font-size: 1.05rem; letter-spacing: -.01em; }
.impact-grid p { margin: 0; color: var(--ink-faint); font-size: .78rem; line-height: 1.5; }

.expertise-list { border-top: 1px solid var(--line); }
.expertise-list article { display: grid; grid-template-columns: 70px minmax(220px, .65fr) 1fr; gap: 30px; align-items: start; padding: 32px 0; border-bottom: 1px solid var(--line); }
.expertise-list span { color: var(--copper); font: .7rem/1.4 var(--mono); }
.expertise-list h3 { margin: 0; font-size: clamp(1.45rem, 2.4vw, 2.45rem); }
.expertise-list p { max-width: 600px; margin: 0; }

.experience-section { padding-top: var(--section); padding-bottom: var(--section); background: var(--paper-deep); }
.experience-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(60px, 10vw, 150px); }
.experience-grid h2 { max-width: 680px; margin-bottom: 0; font-size: clamp(2.5rem, 4.6vw, 5rem); }
.experience-copy > p { margin: 52px 0 62px; font-size: 1.08rem; }
.timeline article { display: grid; grid-template-columns: 90px 1fr; gap: 18px 24px; padding: 25px 0; border-top: 1px solid var(--line); }
.timeline article:last-child { border-bottom: 1px solid var(--line); }
.timeline time { grid-row: span 2; color: var(--copper-dark); font: .65rem/1.5 var(--mono); text-transform: uppercase; }
.timeline h3 { margin: 0; font-size: 1.2rem; }
.timeline p { margin: 0; font-size: .86rem; }

.about-preview { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(48px, 9vw, 130px); align-items: center; padding-top: var(--section); padding-bottom: var(--section); }
.portrait { position: relative; margin: 0; }
.portrait::before { content: ""; position: absolute; inset: 20px -20px -20px 20px; border: 1px solid rgba(142,190,224,.55); border-radius: 12px; z-index: -1; }
.portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 52% 38%; border-radius: 12px; filter: grayscale(.08) saturate(.75) brightness(1.03); }
.about-preview-copy h2 { margin-bottom: 30px; font-size: clamp(2.5rem, 4.8vw, 5.2rem); }
.about-preview-copy > p:not(.section-label) { max-width: 680px; }
.about-preview blockquote { max-width: 700px; margin: 42px 0; padding-left: 26px; border-left: 3px solid var(--copper); color: var(--ink); font-size: clamp(1.2rem, 2vw, 1.7rem); line-height: 1.4; }

.contact-section { padding: 90px 0; background: var(--accent-wash); color: var(--ink); }
.contact-grid { display: grid; grid-template-columns: 2fr 6fr 4fr; gap: 46px; align-items: start; }
.contact-grid .section-label, .contact-grid p { color: var(--ink-soft); }
.contact-grid h2 { color: var(--ink); font-size: clamp(2.2rem, 4vw, 4.3rem); }
.contact-grid > div p { max-width: 580px; }
.contact-link { justify-self: end; display: flex; justify-content: space-between; gap: 24px; width: 100%; max-width: 380px; padding: 17px 0; border-bottom: 1px solid var(--ink); font: 600 clamp(.8rem, 1.4vw, 1rem)/1.3 var(--mono); text-decoration: none; }

.site-footer { padding: 64px 0 38px; background: #f7f7f7; color: var(--ink); }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-bottom: 54px; }
.footer-identity .identity-mark { background: var(--ink); color: #fff; }
.footer-identity .identity-copy small { color: var(--ink-faint); }
.footer-top > a:last-child { color: var(--ink-soft); font-size: .76rem; }
.footer-bottom { display: grid; grid-template-columns: 1fr auto; gap: 40px; padding-top: 28px; border-top: 1px solid var(--line-light); }
.footer-bottom p { max-width: 850px; margin: 0; color: var(--ink-faint); font-size: .66rem; line-height: 1.6; }

/* Work index */
.page-hero { padding-top: clamp(80px, 10vw, 142px); padding-bottom: clamp(70px, 9vw, 120px); border-bottom: 1px solid var(--line); }
.page-hero-grid { display: grid; grid-template-columns: 8fr 4fr; gap: 70px; align-items: end; }
.page-hero h1 { margin: 0; font-size: clamp(3.2rem, 7vw, 7.5rem); }
.page-hero-grid > div p { font-size: 1.05rem; }
.page-hero-grid .confidentiality-inline { margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-faint); font: .68rem/1.6 var(--mono); }
.work-browser { padding-top: 58px; padding-bottom: var(--section); }
.filter-panel { margin-bottom: 42px; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.filter-topline { display: flex; justify-content: space-between; gap: 30px; }
.filter-reset { align-self: start; padding: 0; border: 0; border-bottom: 1px solid var(--line); background: none; cursor: pointer; color: var(--ink-soft); font-size: .72rem; }
.category-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.category-filter { padding: 9px 14px; border: 1px solid var(--line); border-radius: 6px; background: transparent; cursor: pointer; font-size: .72rem; }
.category-filter:hover, .category-filter.is-active { border-color: var(--ink); background: var(--ink); color: #fff; }
.filter-fields { display: grid; grid-template-columns: repeat(4, 1fr) auto; gap: 14px; align-items: end; }
.filter-fields label:not(.recent-toggle) { display: grid; gap: 7px; }
.filter-fields label > span { color: var(--ink-faint); font: .6rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.filter-fields select { width: 100%; min-height: 43px; padding: 8px 30px 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper-bright); color: var(--ink); font-size: .75rem; }
.recent-toggle { display: flex; align-items: center; gap: 10px; min-height: 43px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper-bright); cursor: pointer; }
.recent-toggle input { width: 17px; height: 17px; accent-color: var(--copper); }
.results-line { display: flex; justify-content: space-between; gap: 30px; margin-bottom: 58px; }
.results-line p { margin: 0; color: var(--ink-faint); font: .67rem/1.4 var(--mono); }
.results-line strong { color: var(--copper); font-weight: 600; }
.empty-state { padding: 80px 0; text-align: center; border-top: 1px solid var(--line); }
.empty-state h3 { font-size: 2rem; }

/* About */
.about-hero { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(50px, 9vw, 130px); align-items: center; padding-top: clamp(72px, 9vw, 124px); padding-bottom: var(--section); }
.about-hero h1 { margin-bottom: 32px; }
.about-hero-copy > p:last-child { max-width: 580px; font-size: 1.15rem; }
.about-hero-portrait { margin: 0; }
.about-hero-portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 12px; filter: grayscale(.08) saturate(.75) brightness(1.03); }
.about-hero-portrait figcaption { padding-top: 12px; color: var(--ink-faint); font: .62rem/1.4 var(--mono); text-transform: uppercase; }
.profile-intro { display: grid; grid-template-columns: 2fr 8fr 2fr; gap: 48px; padding-top: 86px; padding-bottom: 110px; border-top: 1px solid var(--line); }
.profile-intro > div { grid-column: 2; }
.profile-intro h2 { max-width: 850px; margin-bottom: 46px; }
.profile-intro p { max-width: 760px; font-size: 1.07rem; }
.philosophy-section { padding: var(--section) 0; background: var(--paper-deep); color: var(--ink); }
.philosophy-grid { display: grid; grid-template-columns: 2fr 8fr 2fr; gap: 48px; }
.philosophy-grid > div { grid-column: 2; }
.philosophy-grid .section-label, .philosophy-grid p { color: var(--ink-faint); }
.philosophy-grid h2 { color: var(--ink); }
.philosophy-grid blockquote { margin: 42px 0; color: transparent; background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; font-size: clamp(1.8rem, 4vw, 4.4rem); font-weight: 450; letter-spacing: -.04em; line-height: 1.13; }
.philosophy-grid p { max-width: 720px; }
.practice-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.practice-grid article { padding: 30px 28px 36px 0; }
.practice-grid article + article { padding-left: 28px; border-left: 1px solid var(--line); }
.practice-grid span { color: var(--copper); font: .68rem/1 var(--mono); }
.practice-grid h3 { margin-top: 58px; margin-bottom: 16px; }
.practice-grid p { margin: 0; font-size: .84rem; }
.credentials-section { padding-top: 0; }
.credential-table { border-top: 1px solid var(--line); }
.credential-table article { display: grid; grid-template-columns: 2fr 8fr 2fr; gap: 40px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.credential-table article > span { color: var(--ink-faint); font: .65rem/1.5 var(--mono); text-transform: uppercase; }
.credential-table h3 { margin: 0 0 7px; font-size: 1.25rem; }
.credential-table p { margin: 0; }
.toolkit-section { padding: var(--section) 0; background: var(--paper-deep); }
.toolkit-grid { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(60px, 10vw, 140px); }
.toolkit-grid h2 { font-size: clamp(2.6rem, 4.6vw, 5rem); }
.tool-groups { border-top: 1px solid var(--line); }
.tool-groups article { display: grid; grid-template-columns: 1.3fr 2.7fr; gap: 28px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.tool-groups h3 { margin: 0; font-size: 1rem; }
.tool-groups p { margin: 0; font-size: .84rem; }
.about-contact { display: grid; grid-template-columns: 2fr 7fr 3fr; gap: 48px; align-items: start; padding-top: 90px; padding-bottom: 90px; }
.about-contact h2 { font-size: clamp(2rem, 3.7vw, 4rem); }
.about-contact .button { justify-self: end; }

/* Project case study */
.case-hero { padding-top: clamp(70px, 9vw, 125px); }
.case-hero-top { display: grid; grid-template-columns: 8fr 4fr; gap: 60px; align-items: end; padding-bottom: 62px; }
.case-hero h1 { margin: 0; font-size: clamp(3.2rem, 6.8vw, 7.5rem); }
.case-summary { align-self: end; }
.case-summary p { margin-bottom: 26px; font-size: 1.05rem; }
.case-title { color: var(--ink-faint); font: .68rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.case-meta { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.case-meta div { padding: 20px 22px 20px 0; }
.case-meta div + div { padding-left: 22px; border-left: 1px solid var(--line); }
.case-meta dt { margin-bottom: 7px; color: var(--ink-faint); font: .58rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.case-meta dd { margin: 0; font-size: .8rem; line-height: 1.4; }
.case-figure { margin: 52px 0 0; overflow: hidden; background: var(--paper-deep); border: 1px solid rgba(80,80,80,.12); border-radius: 12px; }
.case-figure img { width: 100%; aspect-ratio: 16 / 8.5; object-fit: cover; filter: grayscale(.08) saturate(.78) brightness(1.035) contrast(.97); }
.case-figure figcaption { display: flex; justify-content: space-between; gap: 30px; padding: 14px 18px; color: var(--ink-faint); background: #fff; font: .61rem/1.4 var(--mono); }
.case-visual { position: relative; min-height: 520px; overflow: hidden; display: grid; place-items: center; background: var(--night); color: #fff; }
.case-visual::before, .case-visual::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.16); border-radius: 50%; }
.case-visual::before { width: 54%; aspect-ratio: 1; right: -5%; top: -20%; box-shadow: 0 0 0 70px rgba(255,255,255,.025), 0 0 0 140px rgba(255,255,255,.018); }
.case-visual::after { left: -10%; right: 18%; top: 58%; height: 1px; border-radius: 0; border-color: var(--copper); transform: rotate(-6deg); box-shadow: 0 -68px 0 rgba(255,255,255,.1), 0 68px 0 rgba(255,255,255,.08); }
.case-visual span { position: relative; z-index: 2; color: rgba(255,255,255,.72); font: 600 clamp(.8rem, 1.4vw, 1.1rem)/1.5 var(--mono); text-transform: uppercase; letter-spacing: .13em; }
.case-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: clamp(50px, 8vw, 120px); padding-top: 74px; padding-bottom: var(--section); }
.section-nav { align-self: start; position: sticky; top: 120px; border-top: 1px solid var(--line); }
.section-nav p { margin: 18px 0; color: var(--ink-faint); font: .61rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.section-nav a { display: block; padding: 9px 0; color: var(--ink-faint); font-size: .72rem; text-decoration: none; }
.section-nav a:hover, .section-nav a.is-active { color: var(--copper-dark); }
.case-content { max-width: 900px; }
.case-section { display: grid; grid-template-columns: 130px 1fr; gap: 36px; padding: 0 0 clamp(76px, 9vw, 120px); scroll-margin-top: 120px; }
.case-section > .section-label { padding-top: 10px; }
.case-section-body h2 { margin-bottom: 34px; font-size: clamp(2.25rem, 4vw, 4.4rem); }
.case-section-body > p { font-size: 1.05rem; }
.contribution-block { padding: clamp(32px, 5vw, 58px); background: var(--accent-wash); border-radius: 12px; }
.contribution-block h2, .contribution-block p { color: var(--ink); }
.contribution-block p { font-size: clamp(1.08rem, 1.8vw, 1.35rem); }
.method-list, .outcome-list, .technical-list { margin: 38px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.method-list li, .outcome-list li, .technical-list li { display: grid; grid-template-columns: 40px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); color: var(--ink-soft); }
.method-list li::before, .outcome-list li::before, .technical-list li::before { color: var(--copper); font: .65rem/1.7 var(--mono); }
.method-list li:nth-child(1)::before, .outcome-list li:nth-child(1)::before, .technical-list li:nth-child(1)::before { content: "01"; }
.method-list li:nth-child(2)::before, .outcome-list li:nth-child(2)::before, .technical-list li:nth-child(2)::before { content: "02"; }
.method-list li:nth-child(3)::before, .outcome-list li:nth-child(3)::before, .technical-list li:nth-child(3)::before { content: "03"; }
.method-list li:nth-child(4)::before, .outcome-list li:nth-child(4)::before, .technical-list li:nth-child(4)::before { content: "04"; }
.metrics-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin: 42px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metrics-strip article { padding: 28px 22px 28px 0; }
.metrics-strip article + article { padding-left: 22px; border-left: 1px solid var(--line); }
.metrics-strip b { display: block; margin-bottom: 12px; color: var(--copper); font: 500 clamp(1.9rem, 3.5vw, 3.5rem)/1 var(--mono); letter-spacing: -.06em; }
.metrics-strip span { color: var(--ink-faint); font-size: .72rem; }
.gallery-stack { display: grid; gap: 30px; }
.gallery-stack figure { margin: 0; }
.gallery-stack img { width: 100%; background: var(--paper-deep); border: 1px solid var(--line); border-radius: 12px; filter: grayscale(.08) saturate(.78) brightness(1.03) contrast(.98); }
.gallery-stack figcaption { padding-top: 10px; color: var(--ink-faint); font: .62rem/1.5 var(--mono); }
.technical-diagram { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px; padding: 48px; background: var(--night); color: #fff; overflow: hidden; }
.technical-diagram::before { content: ""; position: absolute; left: 15%; right: 15%; top: 50%; height: 1px; background: var(--copper); }
.technical-diagram div { position: relative; z-index: 1; min-height: 130px; display: grid; align-content: space-between; padding: 18px; border: 1px solid rgba(255,255,255,.25); background: var(--night-soft); }
.technical-diagram b { color: #efb39f; font: .68rem/1 var(--mono); }
.technical-diagram span { color: rgba(255,255,255,.72); font-size: .78rem; }
.tool-credit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 34px; }
.tool-credit-grid article { padding-top: 18px; border-top: 1px solid var(--line); }
.tool-credit-grid h3 { font-size: 1rem; }
.tag-list { display: flex; gap: 8px; flex-wrap: wrap; }
.tag-list span { padding: 7px 9px; border: 1px solid var(--line); color: var(--ink-soft); font: .62rem/1.2 var(--mono); }
.credit-list { margin: 0; padding: 0; list-style: none; }
.credit-list li { padding: 7px 0; color: var(--ink-soft); font-size: .82rem; }
.confidentiality-note { padding: 28px; border: 1px solid var(--line); background: var(--paper-deep); }
.confidentiality-note h3 { font-size: 1.05rem; }
.confidentiality-note p { margin: 0; font-size: .82rem; }
.evolution-note { margin-top: 28px; padding-left: 22px; border-left: 3px solid var(--copper); }
.evolution-note b { display: block; margin-bottom: 6px; font: .65rem/1.3 var(--mono); text-transform: uppercase; color: var(--copper-dark); }
.next-project { padding: 80px 0; background: var(--paper-deep); }
.next-project a { display: grid; grid-template-columns: 2fr 8fr 2fr; gap: 42px; align-items: center; text-decoration: none; }
.next-project span { color: var(--ink-faint); font: .63rem/1.4 var(--mono); text-transform: uppercase; }
.next-project h2 { margin: 0; font-size: clamp(2.1rem, 4.2vw, 4.7rem); }
.next-project b { justify-self: end; color: var(--copper); font-size: 2rem; font-weight: 400; }
.not-found { min-height: 65vh; display: grid; place-items: center; text-align: center; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1024px) {
  .hero-copy { grid-column: 1 / span 7; }
  .hero-figure { grid-column: 8 / -1; opacity: .9; }
  .filter-fields { grid-template-columns: repeat(2, 1fr); }
  .recent-toggle { grid-column: span 2; }
  .impact-grid { grid-template-columns: 1fr 1fr; }
  .impact-grid article:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line-light); }
  .impact-grid article:nth-child(4) { border-top: 1px solid var(--line-light); }
  .practice-grid { grid-template-columns: 1fr 1fr; }
  .practice-grid article:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .practice-grid article:nth-child(4) { border-top: 1px solid var(--line); }
  .case-layout { grid-template-columns: 210px minmax(0, 1fr); gap: 52px; }
  .case-section { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; --section: 88px; }
  .site-header { backdrop-filter: none; }
  .header-inner { min-height: 74px; }
  .identity-copy small { display: none; }
  .menu-button { display: block; position: relative; z-index: 2; }
  .primary-nav { position: fixed; inset: 0; display: grid; align-content: center; gap: 0; padding: 96px var(--gutter) 40px; background: #fff; transform: translateX(100%); transition: transform .35s var(--ease); }
  .primary-nav.is-open { transform: none; }
  .primary-nav a { padding: 16px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 1.7rem; }
  .primary-nav a[aria-current="page"] { color: var(--blue); }
  .primary-nav a::after { display: none; }
  .menu-button[aria-expanded="true"] { color: var(--ink); }
  .hero { display: block; padding-top: 72px; }
  .hero h1 { font-size: clamp(3.4rem, 16vw, 5.5rem); }
  .hero-figure { margin: 62px 0 0; }
  .hero-figure img { aspect-ratio: 4 / 3; }
  .hero-index { grid-template-columns: 1fr; margin-top: 32px; }
  .hero-index > div { padding: 18px 0; }
  .hero-index > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .edition-note, .section-heading, .experience-grid, .about-preview, .contact-grid, .page-hero-grid, .about-hero, .profile-intro, .philosophy-grid, .toolkit-grid, .about-contact, .case-hero-top { grid-template-columns: 1fr; }
  .edition-note { gap: 18px; }
  .edition-note > .text-link { justify-self: start; }
  .section-heading { gap: 25px; }
  .project-grid { display: grid; grid-template-columns: 1fr; }
  .project-card, .project-card:nth-child(3n+1), .project-card:nth-child(3n+2), .project-card:nth-child(3n+3) { grid-column: 1; }
  .project-card h3 { font-size: 1.85rem; }
  .impact-grid { grid-template-columns: 1fr 1fr; }
  .impact-grid article { padding: 26px 18px 26px 0; }
  .impact-grid article + article { padding-left: 18px; }
  .impact-grid b { margin-bottom: 28px; }
  .expertise-list article { grid-template-columns: 34px 1fr; gap: 12px 16px; }
  .expertise-list p { grid-column: 2; }
  .about-preview { gap: 68px; }
  .portrait { max-width: 88%; }
  .contact-grid { gap: 20px; }
  .contact-link { justify-self: start; margin-top: 26px; }
  .footer-bottom { grid-template-columns: 1fr; }
  .page-hero-grid { gap: 34px; }
  .filter-fields { grid-template-columns: 1fr; }
  .recent-toggle { grid-column: 1; }
  .results-line { display: block; }
  .results-line p + p { margin-top: 8px; }
  .practice-grid { grid-template-columns: 1fr; }
  .practice-grid article, .practice-grid article + article { padding: 25px 0; border-left: 0; border-top: 1px solid var(--line); }
  .practice-grid article:first-child { border-top: 0; }
  .practice-grid h3 { margin-top: 30px; }
  .profile-intro, .philosophy-grid { gap: 18px; }
  .profile-intro > div, .philosophy-grid > div { grid-column: 1; }
  .credential-table article { grid-template-columns: 1fr; gap: 12px; }
  .tool-groups article { grid-template-columns: 1fr; gap: 8px; }
  .about-contact .button { justify-self: start; }
  .case-hero-top { gap: 28px; }
  .case-meta { grid-template-columns: 1fr 1fr; }
  .case-meta div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .case-meta div:nth-child(4) { border-top: 1px solid var(--line); }
  .case-figure img { aspect-ratio: 4 / 3; }
  .case-visual { min-height: 360px; }
  .case-layout { display: block; padding-top: 46px; }
  .section-nav { position: relative; top: auto; display: flex; gap: 16px; overflow-x: auto; margin-bottom: 70px; padding: 12px 0; border-bottom: 1px solid var(--line); scrollbar-width: thin; }
  .section-nav p { display: none; }
  .section-nav a { flex: 0 0 auto; }
  .case-section { padding-bottom: 78px; }
  .metrics-strip { grid-template-columns: 1fr; }
  .metrics-strip article { padding: 20px 0; }
  .metrics-strip article + article { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .technical-diagram { grid-template-columns: 1fr; padding: 28px; }
  .technical-diagram::before { left: 50%; right: auto; top: 15%; bottom: 15%; width: 1px; height: auto; }
  .tool-credit-grid { grid-template-columns: 1fr; }
  .next-project a { grid-template-columns: 1fr auto; }
  .next-project span { grid-column: 1 / -1; }
}

@media (max-width: 420px) {
  .hero h1 { font-size: 3.15rem; }
  .button-row { align-items: flex-start; flex-direction: column; }
  .impact-grid { grid-template-columns: 1fr; }
  .impact-grid article, .impact-grid article + article { padding: 25px 0; border-left: 0; border-top: 1px solid var(--line-light); }
  .impact-grid article:first-child { border-top: 0; }
  .about-hero h1, .page-hero h1, .case-hero h1 { font-size: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}