/* VIRON Labs — "Horizon line" (release 2026-10-18) */
@font-face { font-family: "Inter"; src: url("fonts/inter-400.woff") format("woff"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-600.woff") format("woff"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter Display"; src: url("fonts/inter-display-700.woff") format("woff"); font-weight: 700; font-style: normal; font-display: swap; }

:root {
  --sky: #dbe6eb;
  --limestone: #eef0ea;
  --paper: #f8f9f5;
  --ink: #14222c;
  --ink-2: #43525d;
  --dusk: #11263a;
  --dusk-2: #1a3550;
  --on-dusk: #eef0ea;
  --on-dusk-2: #b9c6d0;
  --sun: #f2b24e;
  --sun-deep: #855507;
  --lift: #17706a;
  --lift-on-dusk: #74d8cb;
  --slate: #586873;
  --rule: rgba(20, 34, 44, .16);
  --rule-dusk: rgba(238, 240, 234, .18);
  --focus: #0b5fff;
  --radius: 14px;
  --wrap: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
  --display: "Inter Display", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --text: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--limestone);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--text);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
/* focus on dark surfaces */
.dusk :focus-visible, .site-footer :focus-visible, .hero-copy :focus-visible { outline-color: var(--sun); }
p { margin: 0 0 1em; max-width: 68ch; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -.022em; line-height: 1.08; margin: 0; text-wrap: balance; }
h2 { font-size: clamp(2rem, 4.2vw, 3.1rem); margin-bottom: .45em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); letter-spacing: -.012em; margin-bottom: .4em; }
.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.lede { font-size: clamp(1.125rem, 1.8vw, 1.3rem); line-height: 1.5; color: var(--ink-2); max-width: 58ch; }
.small { font-size: .9375rem; color: var(--ink-2); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.skip { position: absolute; left: 12px; top: -60px; z-index: 50; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 8px; }
.skip:focus { top: 12px; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(219, 230, 235, .92); backdrop-filter: saturate(1.2) blur(10px); -webkit-backdrop-filter: saturate(1.2) blur(10px); border-bottom: 1px solid var(--rule); }
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-weight: 700; letter-spacing: .14em; font-size: .95rem; }
.brand svg { width: 34px; height: 22px; flex: none; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.site-nav a { text-decoration: none; padding: 10px 12px; border-radius: 10px; font-weight: 600; font-size: .95rem; }
.site-nav a:hover { background: rgba(20, 34, 44, .07); }
.site-nav .cta { background: var(--ink); color: var(--paper); margin-left: 6px; }
.site-nav .cta:hover { background: var(--dusk-2); }
.nav-toggle { display: none; margin-left: auto; min-height: 44px; padding: 0 14px; border: 1px solid var(--rule); border-radius: 10px; background: transparent; color: var(--ink); font: 600 .95rem var(--text); }
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: 8px; }
  .site-nav { position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gutter) 16px; background: var(--sky); border-bottom: 1px solid var(--rule); }
  .site-nav[data-open="false"] { display: none; }
  .site-nav a { padding: 14px 4px; border-bottom: 1px solid var(--rule); border-radius: 0; }
  .site-nav .cta { margin: 12px 0 0; text-align: center; border-radius: 10px; border: 0; }
}
@media (min-width: 861px) { .site-nav[data-open] { display: flex; } }

/* ---------- hero: an attitude indicator. Sky above the line, ground below. ---------- */
.hero { position: relative; isolation: isolate; overflow: hidden; background: linear-gradient(180deg, var(--dusk) 0%, #0d1f30 100%); color: var(--on-dusk); padding-block: clamp(40px, 7vw, 88px) clamp(56px, 8vw, 96px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .9fr); column-gap: clamp(24px, 5vw, 72px); align-items: start; }
.hero-text { grid-column: 1; }
.hero-kicker { font-weight: 600; color: var(--ink-2); margin-bottom: 18px; }
.hero h1 { font-size: clamp(3.3rem, 9.4vw, 7.2rem); line-height: .95; letter-spacing: -.045em; }
.hero h1 > span { display: block; position: relative; }
.hero .above { color: var(--ink); padding-bottom: .26em; }
/* the sky: full-bleed, from the top of the hero down to the horizon line */
.hero .above::before { content: ""; position: absolute; z-index: -1; left: -100vw; right: -100vw; bottom: 0; top: -100vh; background: linear-gradient(180deg, #c9d9e1 0%, var(--sky) 100%); }
.hero .below { color: var(--on-dusk); padding-top: .16em; }
.hero .line { height: 2px; }
.hero .line::before { content: ""; position: absolute; left: -100vw; right: -100vw; top: 0; height: 2px; background: var(--sun); box-shadow: 0 0 18px 1px rgba(242, 178, 78, .45); transform-origin: 0 50%; }
.sun { position: absolute; z-index: -1; right: 6%; bottom: 2px; width: clamp(64px, 8vw, 104px); height: calc(clamp(64px, 8vw, 104px) / 2); overflow: hidden; }
.sun::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle at 50% 38%, #ffd896, var(--sun) 60%); }
.hero-copy { margin-top: 28px; max-width: 56ch; }
.hero-copy p { color: var(--on-dusk-2); font-size: clamp(1.0625rem, 1.6vw, 1.2rem); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }
.hero-note { font-size: .9375rem; color: var(--on-dusk-2); }
.hero-figure { grid-column: 2; grid-row: 1; margin: 0; position: relative; z-index: 2; }
.hero-figure img { border-radius: 22px; box-shadow: 0 30px 60px -28px rgba(8, 20, 32, .8); background: #d9d9d9; }
.hero-figure figcaption { font-size: .8125rem; color: var(--on-dusk-2); margin-top: 12px; max-width: 42ch; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { grid-column: 1; grid-row: auto; max-width: 400px; margin-top: 40px; }
}
@media (prefers-reduced-motion: no-preference) {
  .hero .line::before { animation: draw 1.1s cubic-bezier(.2, .7, .2, 1) .1s both; }
  .sun::before { animation: rise 1.3s cubic-bezier(.2, .7, .2, 1) .45s both; }
  @keyframes draw { from { transform: scaleX(0); } to { transform: scaleX(1); } }
  @keyframes rise { from { transform: translateY(100%); } to { transform: translateY(0); } }
}

/* ---------- buttons ---------- */
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 12px 22px; border-radius: 12px; border: 2px solid transparent; font: 600 1rem/1.2 var(--text); text-decoration: none; cursor: pointer; }
.button-sun { background: var(--sun); color: #1b1404; }
.button-sun:hover { background: #ffc66b; }
.button-ghost { border-color: rgba(238, 240, 234, .45); color: var(--on-dusk); background: transparent; }
.button-ghost:hover { border-color: var(--on-dusk); }
.button-ink { background: var(--ink); color: var(--paper); }
.button-ink:hover { background: var(--dusk-2); }
.button[disabled] { opacity: .55; cursor: not-allowed; }
.text-button { background: none; border: 0; padding: 12px 4px; min-height: 44px; font: 600 1rem var(--text); color: var(--ink); text-decoration: underline; text-underline-offset: .2em; cursor: pointer; }

/* ---------- sections ---------- */
.section { padding-block: clamp(64px, 9vw, 120px); }
.section-head { max-width: 760px; margin-bottom: clamp(32px, 5vw, 56px); }
.dusk { background: var(--dusk); color: var(--on-dusk); }
.dusk .lede, .dusk .small { color: var(--on-dusk-2); }
.dusk a { color: var(--on-dusk); }

/* the pilot's day — a real sequence */
.day { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); counter-reset: day; }
.day li { border-top: 2px solid var(--ink); padding-top: 18px; }
.day .when { display: block; font-weight: 600; color: var(--sun-deep); margin-bottom: 10px; }
.day p { color: var(--ink-2); }
@media (max-width: 860px) { .day { grid-template-columns: 1fr; } }

/* status markers: shape AND colour carry meaning */
.status { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: .875rem; line-height: 1.3; }
.status::before { content: ""; width: 12px; height: 12px; border-radius: 50%; flex: none; }
.status-works { color: var(--lift); }
.status-works::before { background: var(--lift); }
.status-dev { color: var(--sun-deep); }
.status-dev::before { background: linear-gradient(90deg, var(--sun-deep) 50%, transparent 50%); border: 2px solid var(--sun-deep); }
.status-next { color: var(--ink-2); }
.status-next::before { border: 2px solid var(--ink-2); }
.status-later { color: var(--slate); }
.status-later::before { border: 2px dashed var(--slate); }
.dusk .status-next { color: var(--on-dusk-2); }
.dusk .status-next::before { border-color: var(--on-dusk-2); }
.dusk .status-works { color: var(--lift-on-dusk); }
.dusk .status-works::before { background: var(--lift-on-dusk); }
.dusk .status-dev { color: var(--sun); }
.dusk .status-dev::before { background: linear-gradient(90deg, var(--sun) 50%, transparent 50%); border-color: var(--sun); }

/* instruments */
.instruments { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(20px, 3vw, 32px); align-items: start; }
.instrument { background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); padding: clamp(22px, 3vw, 36px); }
.instrument .status { margin-bottom: 14px; }
.instrument h3 { font-size: clamp(1.6rem, 2.8vw, 2.1rem); }
.instrument .tagline { font-size: 1.15rem; color: var(--ink); font-weight: 600; margin-bottom: .6em; }
.facts { list-style: none; margin: 22px 0 0; padding: 0; border-top: 1px solid var(--rule); }
.facts li { padding: 12px 0; border-bottom: 1px solid var(--rule); color: var(--ink-2); font-size: .975rem; }
.facts strong { color: var(--ink); font-weight: 600; }
.family { margin-top: clamp(28px, 4vw, 44px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(20px, 3vw, 32px); }
.family > div { border-top: 1px solid var(--rule); padding-top: 16px; }
.family h3 { font-size: 1.2rem; }
.family p { color: var(--ink-2); font-size: .975rem; }
@media (max-width: 860px) { .instruments, .family { grid-template-columns: 1fr; } }

/* VIRON Air */
.air-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.air-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule-dusk); }
.air-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 20px; padding: 16px 0; border-bottom: 1px solid var(--rule-dusk); }
.air-list .what { font-weight: 600; }
.air-list .status { justify-self: end; text-align: right; }
.air-list .detail { grid-column: 1 / -1; color: var(--on-dusk-2); font-size: .95rem; }
.lab { margin-top: 32px; border-left: 3px solid var(--sun); padding: 4px 0 4px 20px; }
.lab h3 { font-size: 1.3rem; }
@media (max-width: 860px) { .air-grid { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .air-list li { grid-template-columns: 1fr; } .air-list .status { justify-self: start; text-align: left; } }

/* progress: the task line */
.task { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 28px); margin-top: 8px; }
.task::before { content: ""; position: absolute; left: 0; right: 0; top: 7px; height: 2px; background: linear-gradient(90deg, var(--lift) 0 25%, var(--sun-deep) 25% 50%, var(--ink-2) 50% 75%, var(--slate) 75%); }
.leg { position: relative; padding-top: 34px; }
.leg::before { content: ""; position: absolute; top: 0; left: 0; width: 16px; height: 16px; border-radius: 50%; background: var(--limestone); border: 3px solid currentColor; }
.leg.works { color: var(--lift); } .leg.works::before { background: var(--lift); }
.leg.dev { color: var(--sun-deep); }
.leg.next { color: var(--ink-2); }
.leg.later { color: var(--slate); } .leg.later::before { border-style: dashed; }
.leg h3 { color: var(--ink); font-size: 1.25rem; }
.leg ul { list-style: none; margin: 12px 0 0; padding: 0; color: var(--ink-2); font-size: .96rem; }
.leg li { padding: 10px 0; border-top: 1px solid var(--rule); }
.leg li strong { color: var(--ink); font-weight: 600; display: block; }
.asof { margin-top: 28px; font-size: .9375rem; color: var(--ink-2); }
@media (max-width: 960px) {
  .task { grid-template-columns: 1fr; gap: 0; padding-left: 30px; }
  .task::before { left: 7px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; background: linear-gradient(180deg, var(--lift) 0 25%, var(--sun-deep) 25% 50%, var(--ink-2) 50% 75%, var(--slate) 75%); }
  .leg { padding: 0 0 28px; }
  .leg::before { left: -30px; top: 4px; }
}

/* workbench */
.bench { display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
.bench figure { margin: 0; }
.bench img { border-radius: var(--radius); }
.bench figcaption { font-size: .8125rem; color: var(--ink-2); margin-top: 10px; }
.signature { font-weight: 600; color: var(--ink); }
@media (max-width: 860px) { .bench { grid-template-columns: 1fr; } .bench figure { max-width: 260px; } }

/* testing */
.testing { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); list-style: none; padding: 0; margin: 0; }
.testing li { border-top: 2px solid var(--on-dusk); padding-top: 16px; }
.testing h3 { font-size: 1.2rem; }
.testing p { color: var(--on-dusk-2); font-size: .975rem; }
@media (max-width: 860px) { .testing { grid-template-columns: 1fr; } }

/* faq */
.faq { max-width: 820px; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; padding: 20px 40px 20px 0; position: relative; font-weight: 600; font-size: 1.1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 8px; top: 50%; width: 12px; height: 12px; border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: translateY(-70%) rotate(45deg); }
.faq details[open] summary::after { transform: translateY(-20%) rotate(-135deg); }
.faq details p { color: var(--ink-2); padding-bottom: 8px; }

/* beta form */
.beta { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.beta-points { list-style: none; padding: 0; margin: 20px 0 0; }
.beta-points li { padding: 10px 0 10px 28px; position: relative; color: var(--ink-2); }
.beta-points li::before { content: ""; position: absolute; left: 0; top: 19px; width: 14px; height: 2px; background: var(--sun-deep); }
form#beta-form { background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); padding: clamp(20px, 3vw, 36px); }
.field { display: block; font-weight: 600; font-size: .975rem; margin-bottom: 18px; }
.field .hint { display: block; font-weight: 400; color: var(--ink-2); font-size: .875rem; }
.field input, .field select, .field textarea { display: block; width: 100%; margin-top: 6px; min-height: 48px; padding: 11px 13px; border: 1px solid #8796a0; border-radius: 10px; background: #fff; color: var(--ink); font: 400 1rem/1.4 var(--text); }
.field textarea { resize: vertical; min-height: 96px; }
.field input:disabled, .field select:disabled, .field textarea:disabled { background: #eceeea; color: var(--ink-2); }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 16px; }
@media (max-width: 560px) { .field-grid { grid-template-columns: 1fr; } }
.optional-fields { margin: 4px 0 18px; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.optional-fields summary { cursor: pointer; padding: 14px 0; font-weight: 600; min-height: 44px; }
.optional-fields[open] { padding-bottom: 6px; }
.consent { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 12px; align-items: start; margin: 6px 0 22px; font-size: .975rem; }
.consent input { width: 22px; height: 22px; margin: 2px 0 0; accent-color: var(--ink); }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.form-status { margin: 16px 0 0; font-weight: 600; min-height: 1.5em; outline: none; }
form[data-state="stored"] .form-status { color: var(--lift); }
form[data-state="pending"] .form-status, form[data-state="blocked"] .form-status { color: #8a2f12; }
.honeypot { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.data-use { margin-top: 18px; font-size: .9375rem; color: var(--ink-2); }
@media (max-width: 860px) { .beta { grid-template-columns: 1fr; } }

/* footer */
.site-footer { background: #0c1d2c; color: var(--on-dusk-2); padding-block: 48px 40px; font-size: .9375rem; }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 40px; align-items: start; }
.site-footer .brand { color: var(--on-dusk); margin-bottom: 12px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 4px; justify-content: flex-end; }
.site-footer nav a, .site-footer nav button { color: var(--on-dusk); text-decoration: none; padding: 12px 12px; min-height: 44px; display: inline-flex; align-items: center; border-radius: 8px; background: none; border: 0; font: 600 .9375rem var(--text); cursor: pointer; }
.site-footer nav a:hover, .site-footer nav button:hover { background: rgba(238, 240, 234, .08); }
.site-footer p { max-width: 64ch; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } .site-footer nav { justify-content: flex-start; margin-left: -12px; } }

/* analytics consent */
.consent-panel { position: fixed; z-index: 40; left: 16px; right: 16px; bottom: 16px; margin-inline: auto; max-width: 520px; background: var(--paper); color: var(--ink); border: 1px solid var(--rule); border-radius: 16px; box-shadow: 0 24px 48px -16px rgba(8, 20, 32, .45); padding: 20px 22px; }
.consent-panel h2 { font-size: 1.25rem; margin-bottom: .4em; }
.consent-panel p { font-size: .95rem; color: var(--ink-2); margin-bottom: .8em; }
.consent-panel .choices { display: flex; flex-wrap: wrap; gap: 10px; }
.consent-panel .choices .button { flex: 1 1 140px; }
.consent-panel .consent-more { margin: 12px 0 0; }
@media (max-width: 560px) {
  .consent-panel { left: 8px; right: 8px; bottom: 8px; padding: 14px 16px; }
  .consent-panel h2 { font-size: 1.1rem; }
  .consent-panel p { font-size: .9rem; margin-bottom: .5em; }
  .consent-panel .consent-more { font-size: .8125rem; margin-top: 8px; }
}
.button-outline { border-color: var(--ink); color: var(--ink); background: transparent; }
.button-outline:hover { background: rgba(20, 34, 44, .06); }
.analytics-choice { font-size: .875rem; }

/* inner pages */
.page-head { background: var(--sky); border-bottom: 2px solid var(--sun); padding-block: clamp(48px, 7vw, 88px) clamp(32px, 4vw, 48px); }
.page-head h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); letter-spacing: -.035em; margin-bottom: .3em; }
.prose { padding-block: clamp(40px, 6vw, 72px); }
.prose h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); margin: 1.6em 0 .5em; }
.prose h2:first-child { margin-top: 0; }
.prose ul { max-width: 68ch; padding-left: 1.2em; }
.prose li { margin-bottom: .5em; }
.entry { border-top: 1px solid var(--rule); padding: 28px 0 8px; display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 8px 32px; }
.entry time { font-weight: 600; color: var(--sun-deep); }
.entry h2 { font-size: clamp(1.25rem, 2vw, 1.5rem); letter-spacing: -.012em; margin: 0 0 .5em; }
.entry .note { font-size: .9375rem; color: var(--ink-2); }
@media (max-width: 700px) { .entry { grid-template-columns: 1fr; } }

@media (min-width: 1100px) { .consent-panel { left: 24px; right: auto; bottom: 24px; margin: 0; max-width: 440px; } }

@media print { .site-header, .consent-panel, .nav-toggle { display: none !important; } body { background: #fff; } }

/* 2026-10-19: unfilled privacy details are shown loudly so they cannot ship unnoticed. */
mark.todo { background: #ffd34d; color: #14222c; padding: 0 .25em; border-radius: 3px; font-weight: 600; }
.dusk .asof { color: var(--on-dusk-2); }