/* Digital Freedom of Movement – dfom.eu
   Eurosky palette, self-hosted fonts (no third-party requests). */

@font-face { font-family: "Inter"; src: url("fonts/Inter-VariableFont_opsz.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-SemiBold.woff2") format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --cotton: #f7f6f2;
  --stone: #eceae5;
  --stone-mid: #e0ddd8;
  --line: #d3d0ca;
  --charcoal: #5f5d59;
  --ink: #1a1a1a;
  --yellow: #f7d204;
  --red: #b3261e;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--cotton); color: var(--ink); font: 400 17px/1.6 var(--sans); font-feature-settings: "cv11", "ss01"; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--mono); font-weight: 600; letter-spacing: -0.03em; line-height: 1.12; margin: 0 0 .5em; text-wrap: balance; }
h2 { font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.35rem); }
h3 { font-size: 1.1rem; letter-spacing: -0.02em; line-height: 1.3; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: .82em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 12px; z-index: 99; }
.skip:focus { left: 8px; }

/* labels */
.label, .kicker { font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--charcoal); margin-bottom: 14px; }
.label-sub { margin-top: 48px; }
.fineprint { font-size: .86rem; color: var(--charcoal); margin-top: 16px; }
.meta { font-family: var(--mono); font-size: .72rem; opacity: .7; margin-left: 6px; font-weight: 400; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(247,246,242,.92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { font-family: var(--mono); font-weight: 600; font-size: 1.05rem; text-decoration: none; letter-spacing: -0.02em; margin: 0; }
.brand span { color: var(--charcoal); font-weight: 400; }
.nav nav { margin-left: auto; }
.nav ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
.nav ul a { font-family: var(--mono); font-size: .82rem; text-decoration: none; color: var(--charcoal); }
.nav ul a:hover { color: var(--ink); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 4px; font: 500 .95rem/1 var(--mono); letter-spacing: -0.01em; background: var(--ink); color: #fff; border: 1.5px solid var(--ink); padding: 15px 22px; border-radius: 999px; text-decoration: none; cursor: pointer; transition: transform .15s, background .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--stone); }
.btn-small { padding: 10px 16px; font-size: .82rem; }
.btn-wide { width: 100%; margin-top: 8px; padding: 18px; }
.btn[disabled] { opacity: .6; cursor: wait; transform: none; }

/* hero */
.hero { padding: 96px 0 72px; border-bottom: 1px solid var(--line); }
.hero h1 { font-size: clamp(2.4rem, 1.2rem + 5vw, 5rem); letter-spacing: -0.045em; max-width: 14ch; margin-bottom: 28px; }
.lede { font-size: clamp(1.1rem, 1rem + .45vw, 1.35rem); line-height: 1.5; max-width: 40em; color: #2c2c2a; }
.lede + .lede { margin-top: -.2em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 36px 0 56px; }
.hero-stats { display: flex; gap: 48px; margin: 0; padding-top: 28px; border-top: 1px solid var(--line); max-width: 560px; }
.hero-stats div { display: flex; flex-direction: column-reverse; }
.hero-stats dt { font: 600 2.2rem/1 var(--mono); letter-spacing: -0.04em; }
.hero-stats dd { margin: 0 0 8px; font-family: var(--mono); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--charcoal); }

/* sections */
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.grid-2 { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: start; }
.prose { max-width: 38em; }
.prose p:last-child { margin-bottom: 0; }

/* test table */
.test-table { border-top: 1.5px solid var(--ink); }
.tt-row { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); align-items: baseline; font-size: .95rem; }
.tt-head { font-family: var(--mono); font-size: .8rem; font-weight: 500; }
.tt-row [role=rowheader] { font-weight: 600; }
.num { font: 600 2rem/1 var(--mono); letter-spacing: -0.04em; }
.no { font-family: var(--mono); background: var(--yellow); padding: 2px 8px; border-radius: 4px; font-size: .85rem; }

/* diagram */
.diagram { margin: 56px 0 0; display: grid; grid-template-columns: 1fr 1.35fr; gap: 20px; background: var(--cotton); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.diagram figcaption { grid-column: 1 / -1; font-family: var(--mono); font-size: .72rem; color: var(--charcoal); border-top: 1px solid var(--line); padding-top: 14px; }
.dg-panel { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 20px; font-size: .85rem; line-height: 1.45; }
.dg-panel p { margin: 0; }
.dg-label { font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--charcoal); margin-bottom: 16px !important; }
.dg-title { font-weight: 600; margin-bottom: 10px !important; }
.dg-title-sm { font-weight: 600; margin-bottom: 2px !important; }
.dg-silo { background: var(--stone); border: 1px solid var(--line); border-radius: 6px; padding: 14px; }
.dg-inner { border: 1px dashed #a8a49d; border-radius: 4px; padding: 10px; color: #444; }
.dg-arrow { text-align: center; position: relative; margin: 18px 0 !important; font-family: var(--mono); font-size: .68rem; color: var(--charcoal); }
.dg-arrow::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1px solid var(--line); }
.dg-arrow span { position: relative; background: #fff; padding: 0 10px; }
.dg-empty { border: 1px solid var(--line); border-radius: 6px; padding: 14px; color: #8b8882; }
.dg-apps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.dg-app { border: 1px solid var(--line); border-radius: 6px; padding: 10px; color: #555; }
.dg-app-host { background: var(--stone); }
.dg-lines { display: grid; grid-template-columns: repeat(3, 1fr); height: 22px; }
.dg-lines i { border-left: 1px solid var(--ink); margin-left: 50%; }
.dg-lines-1 { grid-template-columns: 1fr; }
.dg-lines-1 i { border-left-style: dashed; border-color: #888; }
.dg-pds { border: 1.5px solid var(--ink); border-radius: 6px; padding: 14px; }
.dg-pds .dg-title-sm { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.dg-pds code { font-weight: 400; color: var(--charcoal); }
.dg-move { border: 1px dashed #a8a49d; border-radius: 6px; padding: 12px 14px; display: flex; gap: 16px; justify-content: space-between; align-items: center; color: #555; }
.dg-move code { white-space: nowrap; }

.guarantees ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.guarantees li { border-top: 1.5px solid var(--ink); padding-top: 14px; font-size: .95rem; }
.guarantees li b { display: block; font-family: var(--mono); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 4px; }

/* asks */
.tracks { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 56px; }
.track-name { font-family: var(--mono); font-weight: 600; font-size: .95rem; padding-bottom: 12px; border-bottom: 1.5px solid var(--ink); margin-bottom: 16px; display: flex; justify-content: space-between; align-items: baseline; }
.track-name span { font-weight: 400; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--charcoal); }
.ask { background: var(--stone); border-radius: var(--radius); padding: 24px; margin-bottom: 16px; }
.ask p { margin: 0; font-size: .95rem; color: #2c2c2a; }
.ask h3 { margin: 12px 0 8px; }
.ask-tag { display: inline-block; font: 600 .72rem/1 var(--mono) !important; letter-spacing: .1em; text-transform: uppercase; background: var(--yellow); color: var(--ink) !important; padding: 6px 9px; border-radius: 4px; }

/* stats */
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 56px; }
.stat-row > div { border-top: 1.5px solid var(--ink); padding-top: 16px; }
.stat { font: 600 clamp(2.2rem, 1.6rem + 2vw, 3.2rem)/1 var(--mono); letter-spacing: -0.05em; margin-bottom: 8px; }
.stat-row p:last-child { color: var(--charcoal); font-size: .95rem; margin: 0; }

/* paper */
.paper-card { display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: end; background: var(--ink); color: var(--cotton); border-radius: 14px; padding: 48px; }
.paper-card .label { color: #b9b6b0; }
.paper-card h2 { max-width: 22ch; }
.paper-card p { color: #d8d5cf; max-width: 40em; margin-bottom: 0; }
.paper-actions { display: flex; flex-direction: column; gap: 10px; }
.paper-card .btn { background: var(--yellow); color: var(--ink); border-color: var(--yellow); }
.paper-card .btn-ghost { background: transparent; color: var(--cotton); border-color: #6b6965; }
.paper-card .btn-ghost:hover { background: #2a2a2a; }

/* logos */
.logos { list-style: none; padding: 0; margin: 8px 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.logos li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); height: 120px; display: flex; align-items: center; justify-content: center; gap: 12px; padding: 20px; }
.logos img { max-height: 44px; width: auto; max-width: 150px; object-fit: contain; }
.logos span { font: 600 .9rem/1.2 var(--mono); letter-spacing: -0.02em; }

/* signatories */
.sig-head { display: flex; justify-content: space-between; align-items: end; gap: 32px; flex-wrap: wrap; margin-bottom: 32px; }
.sig-head h2 { margin: 0; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font: 500 .8rem/1 var(--mono); background: transparent; border: 1px solid var(--line); color: var(--ink); padding: 9px 12px; border-radius: 999px; cursor: pointer; }
.chip span { color: var(--charcoal); margin-left: 2px; }
.chip.is-on { background: var(--ink); color: #fff; border-color: var(--ink); }
.chip.is-on span { color: #bbb; }
.chip[hidden] { display: none; }
.sig-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); border-top: 1px solid var(--line); }
.sig-list li { padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; }
.sig-name { font-weight: 600; }
.sig-org { grid-column: 1; color: var(--charcoal); font-size: .9rem; }
.sig-tag { grid-row: 1 / span 2; grid-column: 2; align-self: center; font: 500 .66rem/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--charcoal); border: 1px solid var(--line); padding: 5px 7px; border-radius: 4px; white-space: nowrap; }
.sig-tag.builder { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.sig-loading { color: var(--charcoal); }

/* form */
.form { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 32px; display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label, .seg legend { font: 500 .82rem/1.3 var(--mono); }
.hint { font-weight: 400; color: var(--charcoal); }
input[type=text], input[type=email], select { font: 400 1rem/1.4 var(--sans); color: var(--ink); background: var(--cotton); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; width: 100%; min-height: 48px; }
input:focus, select:focus { outline: 2px solid var(--ink); outline-offset: 0; border-color: var(--ink); }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
.seg { border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg legend { margin-bottom: 8px; padding: 0; }
.seg label { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; cursor: pointer; font-size: .92rem; background: var(--cotton); }
.seg label:has(input:checked) { border-color: var(--ink); background: #fff; box-shadow: inset 0 0 0 1px var(--ink); }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; line-height: 1.45; cursor: pointer; }
.check input { margin-top: 3px; width: 18px; height: 18px; accent-color: var(--ink); flex: none; }
.form .fineprint { margin: 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { margin: 0; font-size: .95rem; }
.form-msg.ok { background: var(--yellow); padding: 14px 16px; border-radius: 8px; }
.form-msg.err { color: var(--red); }
.is-invalid { border-color: var(--red) !important; }

/* footer */
.footer { background: var(--ink); color: #cfccc6; padding: 56px 0; font-size: .9rem; }
.footer-inner { display: grid; grid-template-columns: 1.3fr 1.2fr 1fr; gap: 40px; align-items: start; }
.footer .brand { color: #fff; margin-bottom: 10px; font-size: 1.2rem; }
.footer .brand span { color: #8a8780; }
.coord { display: flex; gap: 14px; align-items: center; }
.coord img { width: 44px; height: 44px; filter: invert(1); opacity: .9; }
.coord p { margin: 0; }
.coord b { color: #fff; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-family: var(--mono); font-size: .82rem; }
.footer a { color: #fff; }

/* privacy page */
.doc { max-width: 720px; padding: 72px 24px 96px; margin: 0 auto; }
.doc h1 { font-size: clamp(2rem, 1.5rem + 2vw, 2.8rem); }
.doc h2 { font-size: 1.25rem; margin-top: 2em; }
.doc ul { padding-left: 1.2em; }

/* responsive */
@media (max-width: 900px) {
  .grid-2, .tracks, .paper-card, .footer-inner { grid-template-columns: 1fr; }
  .grid-2 { gap: 24px; }
  .diagram { grid-template-columns: 1fr; }
  .paper-card { padding: 32px; gap: 28px; }
  .paper-actions { flex-direction: row; flex-wrap: wrap; }
  .nav nav { display: none; }
  .nav .btn-small { margin-left: auto; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 48px; }
  .hero-stats { gap: 28px; }
  .hero-actions .btn { width: 100%; }
  .tt-row { grid-template-columns: 1fr 1fr 1fr; gap: 6px 14px; }
  .tt-row [role=rowheader] { grid-column: 1 / -1; }
  .tt-head span:first-child { display: none; }
  .num { font-size: 1.6rem; }
  .guarantees ul, .stat-row, .field-row, .seg { grid-template-columns: 1fr; }
  .stat-row { gap: 24px; }
  .dg-apps { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
  .dg-app { padding: 8px; font-size: .75rem; }
  .dg-move { flex-direction: column; align-items: flex-start; gap: 6px; }
  .form { padding: 22px; }
  .sig-list { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }

[hidden] { display: none !important; }
.field label.check { font: 400 .92rem/1.45 var(--sans); }
input[type=radio] { accent-color: var(--ink); width: 16px; height: 16px; flex: none; }
@media (max-width: 640px) {
  .logos { grid-template-columns: 1fr 1fr; gap: 8px; }
  .logos li { height: 96px; padding: 14px; flex-direction: column; gap: 6px; }
  .logos img { max-height: 34px; max-width: 120px; }
  .logos span { font-size: .78rem; }
}
.sig-list.single .sig-tag { display: none; }
.form-embed { display: block; padding: 24px 24px 20px; }
.form-embed iframe { display: block; width: 100%; border: 0; min-height: 400px; }
.form-embed .fineprint { border-top: 1px solid var(--line); padding-top: 14px; margin-top: 8px; }
.form-embed { padding: 8px 16px 20px; }
.form-embed .fineprint { margin-left: 8px; margin-right: 8px; }
@media (max-width: 640px) { .form-embed { padding: 4px 6px 16px; } }
@media (min-width: 901px) { .logos { grid-template-columns: repeat(4, 1fr); } }
.logos .logo-tall img { max-height: 76px; max-width: 170px; }

.more { font-family: var(--mono); font-size: .88rem; font-weight: 500; }
.paper-note { font-family: var(--mono); font-size: .8rem; color: var(--cotton); text-align: center; margin-top: 6px; }
.doc-intro { font-size: 1.05rem; }
.doc-scope { font-size: .95rem; color: var(--charcoal); border-left: 3px solid var(--yellow); padding: 4px 0 4px 16px; }
.doc li { margin-bottom: .5em; }
.doc-sources { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: .9rem; }
.doc-sources ul { columns: 2; column-gap: 32px; padding-left: 1.1em; }
.doc-back { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 48px; }
@media (max-width: 640px) { .doc-sources ul { columns: 1; } }