/* ============================================================
   Hartmann Association — Schweizer Modernismus
   Strenges 12-Spalten-Raster, Helvetica, sachlich.
============================================================ */

:root {
  --accent-h: 155;
  --accent: oklch(48% 0.07 var(--accent-h));
  --accent-soft: oklch(94% 0.02 var(--accent-h));

  --bg: #f7f7f5;
  --bg-elev: #ffffff;
  --ink: #0e0e0c;
  --ink-2: #2a2a27;
  --ink-3: #6b6b66;
  --ink-4: #a6a69f;
  --rule: #d9d9d3;
  --rule-soft: #ebebe6;

  --serif: "Times New Roman", Times, "Tinos", serif;
  --sans: "Helvetica Neue", Helvetica, Inter, "Helvetica", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, "JetBrains Mono", monospace;

  --display-font: var(--serif);
  --display-tracking: -0.015em;
  --display-weight: 400;

  --content-max: 1440px;
  --gutter: 32px;
  --col-gap: 24px;

  --t-1: 11px;     /* meta / labels */
  --t-2: 13px;     /* small body */
  --t-3: 15px;     /* body */
  --t-4: 18px;     /* lead */
  --t-5: 22px;     /* sub-headings */
  --t-6: 32px;     /* h3 */
  --t-7: 48px;     /* h2 */
  --t-8: 72px;     /* h1 */
  --t-9: 112px;    /* hero display */
}

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

html {
  font-family: var(--sans);
  font-size: var(--t-3);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  line-height: 1.55;
  color: var(--ink-2);
  background: var(--bg);
  min-height: 100vh;
}

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

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

/* ── Grid container ──────────────────────────── */
.wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  row-gap: 0;
}

/* ── Header ──────────────────────────────────── */
.site-hd {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 0.5px solid var(--rule);
}
.site-hd-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  padding: 18px 0;
}
.brand {
  font-family: var(--sans);
  font-weight: 500;
  font-size: var(--t-3);
  letter-spacing: -0.01em;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.brand .mark {
  display: inline-flex;
  width: 18px; height: 18px;
  background: var(--ink);
  position: relative;
}
.brand .mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--bg);
}
.brand b { font-weight: 500; }
.brand span { color: var(--ink-3); font-weight: 400; }

.nav {
  display: flex;
  gap: 28px;
  justify-self: center;
  font-size: var(--t-2);
}
.nav a {
  color: var(--ink-2);
  position: relative;
  padding: 6px 0;
  letter-spacing: 0.005em;
}
.nav a.active { color: var(--ink); }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -19px;
  height: 1px;
  background: var(--ink);
}

.hd-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.hd-meta .dot {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* ── Section primitives ──────────────────────── */
.sect { padding: 96px 0; border-top: 0.5px solid var(--rule); }
.sect:first-of-type { border-top: 0; }

.sect-head {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  padding-bottom: 56px;
  align-items: end;
}
.sect-head .eyebrow { grid-column: 1 / span 3; }
.sect-head h2 { grid-column: 4 / span 8; }

.eyebrow {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow .num {
  display: inline-block;
  min-width: 28px;
  color: var(--ink-4);
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: clamp(56px, 8vw, var(--t-9)); line-height: 0.95; }
h2 { font-size: clamp(40px, 5.2vw, var(--t-7)); line-height: 1.02; }
h3 { font-size: var(--t-6); line-height: 1.1; }
h4 { font-size: var(--t-5); line-height: 1.2; }

p { margin: 0; text-wrap: pretty; }

em {
  font-style: italic;
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 400;
}

.lead {
  font-family: var(--sans);
  font-size: var(--t-4);
  line-height: 1.5;
  color: var(--ink-2);
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

.body { font-size: var(--t-3); line-height: 1.6; color: var(--ink-2); }

/* ── Hero ────────────────────────────────────── */
.hero { padding: 56px 0 0; }
.hero-inner {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  min-height: calc(100vh - 200px);
  padding-bottom: 48px;
}
.hero-meta {
  grid-column: 1 / span 3;
  display: flex;
  flex-direction: column;
  gap: 24px;
  font-family: var(--mono);
  font-size: var(--t-1);
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: 8px;
}
.hero-meta .kv { display: flex; flex-direction: column; gap: 4px; }
.hero-meta .kv span:first-child { color: var(--ink-4); }
.hero-meta .kv span:last-child { color: var(--ink-2); }

.hero-statement {
  grid-column: 4 / span 9;
  display: flex;
  flex-direction: column;
  gap: 48px;
  justify-content: space-between;
}
.hero-headline {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  font-size: clamp(48px, 9vw, var(--t-9));
  line-height: 0.95;
  color: var(--ink);
  max-width: 14ch;
  text-wrap: balance;
}
.hero-foot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--col-gap);
  align-items: end;
  border-top: 0.5px solid var(--rule);
  padding-top: 32px;
}
.hero-foot .lead { max-width: 48ch; }
.hero-foot .nextlink {
  justify-self: end;
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Hero image */
.hero-image-wrap {
  grid-column: 1 / -1;
  margin-top: 16px;
  border-top: 0.5px solid var(--rule);
  padding-top: 16px;
}
.hero-image {
  aspect-ratio: 16 / 7;
  background: var(--rule-soft);
  position: relative;
  overflow: hidden;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.placeholder {
  background: var(--rule-soft);
  position: relative;
  overflow: hidden;
  border: 0.5px solid var(--rule);
}
.placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0,
    transparent 14px,
    color-mix(in oklab, var(--ink) 4%, transparent) 14px,
    color-mix(in oklab, var(--ink) 4%, transparent) 15px
  );
}
.placeholder::after {
  content: attr(data-label);
  position: absolute;
  left: 16px;
  bottom: 16px;
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--bg);
  padding: 4px 8px;
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: var(--t-2);
  letter-spacing: 0;
  padding: 14px 22px;
  border: 0.5px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease;
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--bg); }

.linkarrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--t-2);
  color: var(--ink);
  border-bottom: 0.5px solid var(--ink);
  padding-bottom: 4px;
  transition: gap .2s ease, color .2s ease, border-color .2s ease;
}
.linkarrow:hover { gap: 14px; color: var(--accent); border-color: var(--accent); }

/* ── Pillars ─────────────────────────────────── */
.pillars { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); row-gap: 0; }
.pillar {
  grid-column: span 4;
  padding: 32px 0;
  border-top: 0.5px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.pillar .num {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  color: var(--ink-3);
}
.pillar h4 { font-size: var(--t-5); }
.pillar p { color: var(--ink-3); }

/* Stats strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat {
  padding: 32px 24px 32px 0;
  border-left: 0.5px solid var(--rule);
  padding-left: 24px;
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat .figure {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  color: var(--ink);
  display: block;
  margin-bottom: 12px;
}
.stat .figure sup { font-size: 0.5em; vertical-align: top; color: var(--ink-3); margin-left: 4px; }
.stat .label {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: block;
}

/* ── Projects: timeline ──────────────────────── */
.projects-tl { display: flex; flex-direction: column; }
.proj-row {
  display: grid;
  grid-template-columns: 80px 120px 1fr 220px 120px;
  gap: var(--col-gap);
  padding: 28px 0;
  border-top: 0.5px solid var(--rule);
  align-items: baseline;
  cursor: pointer;
  transition: background-color .2s ease, padding .25s ease;
  position: relative;
  color: inherit;
}
.proj-row:hover { background: color-mix(in oklab, var(--accent) 6%, transparent); padding-left: 16px; padding-right: 16px;}
.proj-row:last-child { border-bottom: 0.5px solid var(--rule); }
.proj-year {
  font-family: var(--mono);
  font-size: var(--t-2);
  color: var(--ink);
  letter-spacing: 0.02em;
}
.proj-status {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.proj-status::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--ink-4);
  border-radius: 50%;
}
.proj-status[data-on="ongoing"]::before { background: var(--accent); }
.proj-status[data-on="done"]::before { background: var(--ink-4); }

.proj-title { font-family: var(--display-font); font-weight: var(--display-weight); letter-spacing: var(--display-tracking); font-size: var(--t-5); color: var(--ink); line-height: 1.2; }
.proj-title small { display: block; font-family: var(--sans); font-size: var(--t-2); color: var(--ink-3); margin-top: 4px; letter-spacing: 0; font-weight: 400;}
.proj-loc { font-size: var(--t-2); color: var(--ink-3); }
.proj-sdg { display: flex; gap: 4px; flex-wrap: wrap; justify-self: end;}
.proj-sdg .sdg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  color: #fff;
  background: var(--ink-3);
  letter-spacing: 0;
}

/* SDG colours */
.sdg[data-n="1"]  { background: #e5243b; }
.sdg[data-n="2"]  { background: #dda63a; }
.sdg[data-n="3"]  { background: #4c9f38; }
.sdg[data-n="4"]  { background: #c5192d; }
.sdg[data-n="5"]  { background: #ff3a21; }
.sdg[data-n="6"]  { background: #26bde2; }
.sdg[data-n="7"]  { background: #fcc30b; color: #29261b; }
.sdg[data-n="8"]  { background: #a21942; }
.sdg[data-n="9"]  { background: #fd6925; }
.sdg[data-n="10"] { background: #dd1367; }
.sdg[data-n="11"] { background: #fd9d24; }
.sdg[data-n="12"] { background: #bf8b2e; }
.sdg[data-n="13"] { background: #3f7e44; }
.sdg[data-n="14"] { background: #0a97d9; }
.sdg[data-n="15"] { background: #56c02b; }
.sdg[data-n="16"] { background: #00689d; }
.sdg[data-n="17"] { background: #19486a; }

/* ── About ───────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); row-gap: 64px;}
.principle {
  grid-column: span 6;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding-top: 24px;
  border-top: 0.5px solid var(--rule);
}
.principle .num {
  font-family: var(--mono);
  font-size: var(--t-2);
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.principle h3 { margin-bottom: 12px; font-size: var(--t-5); }
.principle p { font-size: var(--t-3); color: var(--ink-2); }

.facts {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  border-top: 0.5px solid var(--rule);
  padding-top: 32px;
  margin-top: 32px;
}
.facts dt { grid-column: span 3; font-family: var(--mono); font-size: var(--t-1); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding: 16px 0; border-bottom: 0.5px solid var(--rule-soft);}
.facts dd { grid-column: span 9; margin: 0; padding: 16px 0; border-bottom: 0.5px solid var(--rule-soft); font-size: var(--t-3); color: var(--ink); }

/* ── Team ────────────────────────────────────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  row-gap: 64px;
}
.team-member {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.team-member .portrait {
  aspect-ratio: 4 / 5;
  margin-bottom: 24px;
  background: var(--rule-soft);
  overflow: hidden;
}
.team-member .portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.team-member .meta-line {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 0.5px solid var(--rule);
}
.team-member h3 { font-size: var(--t-5); margin-bottom: 8px; }
.team-member .role { font-size: var(--t-2); color: var(--ink-3); margin-bottom: 16px; }
.team-member .bio { font-size: var(--t-3); color: var(--ink-2); line-height: 1.6; }
.team-member .bio p + p { margin-top: 12px; }

/* ── Footer ──────────────────────────────────── */
.site-ft {
  background: var(--ink);
  color: var(--bg);
  padding: 80px 0 40px;
  margin-top: 0;
}
.site-ft a { color: var(--bg); }
.site-ft a:hover { color: var(--accent); }
.ft-grid { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); }
.ft-mark {
  grid-column: 1 / span 5;
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1;
  color: var(--bg);
}
.ft-col { grid-column: span 2; }
.ft-col h5 {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--bg) 60%, transparent);
  margin: 0 0 16px;
  font-weight: 400;
}
.ft-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; font-size: var(--t-2); }
.ft-bottom {
  border-top: 0.5px solid color-mix(in oklab, var(--bg) 25%, transparent);
  margin-top: 80px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--bg) 55%, transparent);
}

/* ── Page sub-templates ──────────────────────── */
.pagehd {
  padding: 80px 0 64px;
  border-bottom: 0.5px solid var(--rule);
}
.pagehd-inner {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--col-gap);
  align-items: end;
}
.pagehd .eyebrow { grid-column: 1 / span 3; }
.pagehd h1 { grid-column: 4 / span 8; font-size: clamp(48px, 7vw, 88px); line-height: 0.98; }
.pagehd .lead { grid-column: 4 / span 6; margin-top: 32px;}

/* Project detail */
.detail { padding: 64px 0 96px; }
.detail-grid { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); }
.detail-meta {
  grid-column: 1 / span 3;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 100px;
  align-self: start;
}
.detail-meta .kv {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 0.5px solid var(--rule-soft);
}
.detail-meta .kv span:first-child {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.detail-meta .kv span:last-child,
.detail-meta .kv div { font-size: var(--t-3); color: var(--ink); }

.detail-body { grid-column: 5 / span 7; display: flex; flex-direction: column; gap: 24px; }
.detail-body h2 { font-size: clamp(36px, 4.5vw, 60px); margin-top: 24px; }
.detail-body h3 { font-size: var(--t-5); margin-top: 24px; }
.detail-body .lead { max-width: 60ch; margin-bottom: 16px; }
.detail-body p { font-size: var(--t-4); line-height: 1.55; max-width: 60ch; color: var(--ink-2);}
.detail-body img { margin: 24px 0; }
.detail-body ul { padding-left: 20px; max-width: 60ch; font-size: var(--t-3); color: var(--ink-2); line-height: 1.7; }
.detail-body ul li + li { margin-top: 8px; }
.detail-body strong { color: var(--ink); font-weight: 500; }
.detail-body a { color: var(--accent); border-bottom: 0.5px solid var(--accent); }

/* Form */
.contact-grid { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); }
.contact-info { grid-column: 1 / span 5; display: flex; flex-direction: column; gap: 32px;}
.contact-form { grid-column: 7 / span 6; display: flex; flex-direction: column; gap: 24px;}
.contact-form label {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.contact-form input,
.contact-form textarea {
  font-family: var(--sans);
  font-size: var(--t-3);
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 0.5px solid var(--rule);
  padding: 8px 0;
  outline: none;
  text-transform: none;
  letter-spacing: 0;
}
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--ink); }
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form .row { display: flex; gap: 16px; margin-top: 8px; align-items: center; }

/* Imprint */
.imprint-body { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: var(--col-gap); }
.imprint-body section { grid-column: 4 / span 7; padding: 32px 0; border-top: 0.5px solid var(--rule); }
.imprint-body section h3 { font-size: var(--t-5); margin-bottom: 12px; }
.imprint-body section p { font-size: var(--t-3); color: var(--ink-2); max-width: 60ch; margin-bottom: 8px;}
.imprint-body .label {
  grid-column: 1 / span 3;
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 32px 0;
  border-top: 0.5px solid var(--rule);
}

/* ── Loading state ───────────────────────────── */
.loading {
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 48px 0;
  text-align: center;
}

/* ── Small screens ───────────────────────────── */
@media (max-width: 900px) {
  :root { --gutter: 20px; --col-gap: 16px; }
  .hero-meta, .hero-statement { grid-column: 1 / -1; }
  .pagehd .eyebrow, .pagehd h1, .pagehd .lead { grid-column: 1 / -1; }
  .pillar { grid-column: span 12; }
  .nav { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 24px 0; border-left: 0; border-top: 0.5px solid var(--rule); }
  .stat:first-child { border-top: 0; }
  .proj-row { grid-template-columns: 60px 1fr; gap: 16px; }
  .proj-row .proj-status, .proj-row .proj-loc, .proj-row .proj-sdg { display: none; }
  .principle { grid-column: 1 / -1; }
  .team-member { grid-column: span 12; }
  .detail-meta, .detail-body { grid-column: 1 / -1; }
  .detail-meta { position: static; }
  .contact-info, .contact-form { grid-column: 1 / -1; }
  .imprint-body section, .imprint-body .label { grid-column: 1 / -1; padding: 24px 0;}
  .ft-mark { grid-column: 1 / -1; margin-bottom: 32px;}
  .ft-col { grid-column: span 6; margin-bottom: 32px;}
  .sect-head .eyebrow, .sect-head h2 { grid-column: 1 / -1; }
  .hero-foot { grid-template-columns: 1fr; }
  .hero-foot .nextlink { justify-self: start; }
}