/* ==========================================================================
   SECM — main.css
   The entire design system. One file, no imports, no CDN, no web fonts.

   Everything is served from this origin, which is what allows the Content
   Security Policy in _headers to be `default-src 'none'` with no exceptions
   for third parties. If you ever add a hosted font or an analytics script,
   this file and _headers are where the cost shows up.

   Direction: Swiss typographic grid (the domain is .ch, so the vernacular is
   earned) rendered in cobalt on white. The signature device is the "message
   header plate" — a monospace key/value block styled after a raw RFC 5322
   header, used sparingly as the hero object and as section anchors.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */

:root {
  /* Palette — six values, everything else is derived from them.
     Cobalt is deliberately a saturated poster blue, not the violet that
     Proton uses, and not the flat corporate #007BFF everyone defaults to. */
  --ink:         #0A1A2F;  /* near-black with a blue cast — body text        */
  --ink-mid:     #40556F;  /* secondary text                                 */
  --ink-soft:    #6C819B;  /* captions, meta                                 */
  --cobalt:      #1450D2;  /* primary brand                                  */
  --cobalt-deep: #0C2F86;  /* hover, dark surfaces                           */
  --sky:         #E6EFFD;  /* tint panels                                    */
  --paper:       #FFFFFF;
  --paper-cool:  #F5F8FD;
  --rule:        #D3DEEF;
  --rule-soft:   #E8EEF8;
  --signal:      #0B7A57;  /* reserved: pass/operational only, never decor   */

  /* Type — system stacks only. No @font-face, no network request, no
     fingerprinting surface. Personality comes from the scale, the tracking
     and the mono utility face, not from a licensed display font. */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;

  --step--2: 0.75rem;
  --step--1: 0.8125rem;
  --step-0:  1rem;
  --step-1:  1.0625rem;
  --step-2:  1.3125rem;
  --step-3:  1.625rem;
  --step-4:  2.125rem;
  --step-5:  2.75rem;
  --step-hero: clamp(2.25rem, 1.1rem + 4.2vw, 3.625rem);

  /* Space — 4px base */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.5rem;
  --s-6:  2rem;
  --s-7:  3rem;
  --s-8:  4rem;
  --s-9:  6rem;

  --container: 1120px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 10px;
  --radius-sm: 6px;

  --shadow-card: 0 1px 2px rgba(10, 26, 47, 0.05),
                 0 8px 24px -16px rgba(10, 26, 47, 0.28);
  --shadow-lift: 0 2px 4px rgba(10, 26, 47, 0.06),
                 0 20px 44px -22px rgba(10, 26, 47, 0.35);
}

/* --------------------------------------------------------------------------
   2. Reset
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-1);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.14;
  letter-spacing: -0.021em;
  font-weight: 700;
  text-wrap: balance;
}

p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
img, svg { display: block; max-width: 100%; }

a {
  color: var(--cobalt);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--cobalt-deep); }

:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 3px;
  border-radius: 3px;
}

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

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

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow { max-width: 760px; }

.section { padding-block: clamp(3.5rem, 7vw, 6rem); }
.section--tint { background: var(--paper-cool); }
.section--sky  { background: var(--sky); }
.section--ink  { background: var(--ink); color: #DEE7F3; }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.section + .section { border-top: 1px solid var(--rule-soft); }
.section--tint + .section--tint,
.section--ink + .section--ink { border-top: 0; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--cobalt);
  color: #fff;
  padding: var(--s-3) var(--s-4);
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip:focus { left: 0; color: #fff; }

/* --------------------------------------------------------------------------
   4. Type utilities
   -------------------------------------------------------------------------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--cobalt);
  margin-bottom: var(--s-4);
  display: flex;
  align-items: center;
  gap: var(--s-3);
}
.eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
  max-width: 120px;
}
.eyebrow--plain::after { display: none; }
.section--ink .eyebrow { color: #7FA6F0; }
.section--ink .eyebrow::after { background: rgba(255, 255, 255, 0.18); }

.h-hero  { font-size: var(--step-hero); letter-spacing: -0.03em; }
.h-major { font-size: clamp(1.75rem, 1.1rem + 2.2vw, var(--step-4)); }
.h-minor { font-size: var(--step-2); letter-spacing: -0.012em; }

.lede {
  font-size: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  color: var(--ink-mid);
  max-width: 58ch;
}

.prose p + p { margin-top: var(--s-4); }
.prose { color: var(--ink-mid); max-width: 68ch; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose h3 { margin-top: var(--s-6); margin-bottom: var(--s-3); color: var(--ink); }

.meta {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* Rhythm between the standard section furniture, so individual pages never
   have to carry spacing utilities. */
.h-hero + .lede,
.h-major + .lede,
.h-minor + .lede,
.h-minor + .card__body { margin-top: var(--s-4); }

.lede + .grid,
.lede + .steps,
.lede + .spec,
.lede + .btn-row,
.h-major + .grid,
.h-major + .steps,
.h-major + .spec,
.card__body + .btn-row { margin-top: var(--s-6); }

.section .lede + .grid,
.section .h-major + .grid { margin-top: var(--s-7); }

.stack-4 > * + * { margin-top: var(--s-4); }
.stack-5 > * + * { margin-top: var(--s-5); }
.stack-6 > * + * { margin-top: var(--s-6); }

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  font: inherit;
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: -0.005em;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease,
              color 140ms ease, transform 140ms ease;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--cobalt);
  color: #fff;
  border-color: var(--cobalt);
}
.btn--primary:hover {
  background: var(--cobalt-deep);
  border-color: var(--cobalt-deep);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--cobalt);
  border-color: var(--rule);
}
.btn--ghost:hover { border-color: var(--cobalt); background: var(--paper-cool); }

.btn--quiet {
  background: transparent;
  color: var(--ink-mid);
  padding-inline: 0.5rem;
}
.btn--quiet:hover { color: var(--cobalt); }

.btn--block { width: 100%; }
.btn--lg { padding: 0.85rem 1.6rem; font-size: var(--step-1); }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  align-items: center;
}

/* --------------------------------------------------------------------------
   6. Masthead
   -------------------------------------------------------------------------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  flex: 0 0 auto;
}
.brand__mark { width: 30px; height: 30px; flex: 0 0 auto; }
.brand__word {
  font-size: 1.3125rem;
  font-weight: 700;
  letter-spacing: -0.045em;
}
.brand__tld { color: var(--cobalt); font-weight: 600; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  margin-left: auto;
}
.nav__link {
  font-size: var(--step-0);
  color: var(--ink-mid);
  text-decoration: none;
  font-weight: 500;
}
.nav__link:hover, .nav__link[aria-current="page"] { color: var(--cobalt); }
.nav__actions { display: flex; gap: var(--s-3); align-items: center; }

@media (max-width: 860px) {
  .nav__link { display: none; }
  .nav__link--keep { display: inline; }
}
@media (max-width: 520px) {
  .nav__actions .btn--ghost { display: none; }
  .brand__word { font-size: 1.1875rem; }
}

/* --------------------------------------------------------------------------
   7. Signature device — the message header plate
   A monospace key/value block styled after a raw mail header. It is the one
   place the design spends its boldness; everything else stays quiet.
   -------------------------------------------------------------------------- */

.plate {
  align-self: start;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--step--1);
}

.plate__bar {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.6rem 0.9rem;
  background: var(--paper-cool);
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: var(--step--2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.plate__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  flex: 0 0 auto;
}

.plate__body { padding: 0.9rem; }

.plate__row {
  display: grid;
  grid-template-columns: minmax(0, 11.5rem) minmax(0, 1fr);
  gap: 0 var(--s-3);
  padding: 0.32rem 0;
  align-items: baseline;
}
.plate__row + .plate__row { border-top: 1px dashed var(--rule-soft); }
.plate__key { color: var(--cobalt); font-weight: 500; word-break: break-word; }
.plate__val { color: var(--ink-mid); word-break: break-word; }
.plate__val--pass { color: var(--signal); }

.plate__foot {
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--rule);
  background: var(--paper-cool);
  color: var(--ink-soft);
  font-size: var(--step--2);
}

@media (max-width: 560px) {
  .plate__row { grid-template-columns: minmax(0, 1fr); }
  .plate__val { padding-left: var(--s-3); }
}

/* --------------------------------------------------------------------------
   8. Hero
   -------------------------------------------------------------------------- */

.hero { padding-block: clamp(3rem, 6vw, 5.5rem) clamp(3.5rem, 7vw, 6rem); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
}

.hero__title { margin-bottom: var(--s-5); }
.hero__lede { margin-bottom: var(--s-6); }

.hero__note {
  margin-top: var(--s-5);
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.rise { animation: rise 520ms cubic-bezier(0.22, 0.61, 0.36, 1) both; }
.rise--2 { animation-delay: 90ms; }
.rise--3 { animation-delay: 180ms; }

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   9. Cards and grids
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }

.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: var(--s-5);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.card:hover { border-color: var(--cobalt); box-shadow: var(--shadow-card); }
.card__icon { width: 34px; height: 34px; margin-bottom: var(--s-4); }
.card__title { margin-bottom: var(--s-2); font-size: var(--step-1); font-weight: 650; }
.card__body { font-size: var(--step-0); color: var(--ink-mid); }

/* Numbered sequence — used only where order genuinely carries meaning. */
.steps { counter-reset: step; display: grid; gap: var(--s-5); }
.step { display: grid; grid-template-columns: 3.25rem minmax(0, 1fr); gap: var(--s-4); }
.step__num {
  counter-increment: step;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--cobalt);
  border-top: 2px solid var(--cobalt);
  padding-top: var(--s-2);
}
.step__num::before { content: "0" counter(step); }
.step__title { font-size: var(--step-1); font-weight: 650; margin-bottom: var(--s-2); }
.step__body { color: var(--ink-mid); font-size: var(--step-0); }

/* Definition rows used on the security page */
.spec { border-top: 1px solid var(--rule); }
.spec__row {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: var(--s-3) var(--s-6);
  padding: var(--s-5) 0;
  border-bottom: 1px solid var(--rule);
}
.spec__term {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--cobalt);
  letter-spacing: 0.01em;
  padding-top: 0.2rem;
}
.spec__def { color: var(--ink-mid); font-size: var(--step-0); }
@media (max-width: 720px) {
  .spec__row { grid-template-columns: minmax(0, 1fr); }
}

.pull {
  border-left: 3px solid var(--cobalt);
  padding-left: var(--s-5);
  font-size: clamp(1.1875rem, 1rem + 0.8vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 46ch;
  text-wrap: balance;
}

/* --------------------------------------------------------------------------
   10. Account panels (sign-in, invitation request, notices)

   IMPORTANT: there is no <form> element anywhere on this site and there are
   no `name` attributes on the controls. The controls are presentational.
   Nothing can be submitted, so nothing can be collected, logged or leaked,
   and `form-action 'none'` in the CSP holds unconditionally.
   -------------------------------------------------------------------------- */

.panel-page {
  min-height: calc(100vh - 68px);
  display: grid;
  place-items: center;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  background:
    linear-gradient(180deg, var(--sky) 0%, rgba(230, 239, 253, 0) 62%),
    var(--paper);
}

.panel {
  width: 100%;
  max-width: 430px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 14px;
  box-shadow: var(--shadow-lift);
  padding: clamp(1.75rem, 4vw, 2.5rem);
}
.panel--wide { max-width: 560px; }

.panel__mark { width: 42px; height: 42px; margin: 0 auto var(--s-5); }
.panel__title {
  font-size: var(--step-3);
  text-align: center;
  margin-bottom: var(--s-2);
}
.panel__sub {
  text-align: center;
  color: var(--ink-mid);
  font-size: var(--step-0);
  margin-bottom: var(--s-6);
}

.field + .field { margin-top: var(--s-4); }
.field__label {
  display: block;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--s-2);
}
.field__control,
.field__control:is(select, textarea) {
  width: 100%;
  font: inherit;
  font-size: var(--step-0);
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.8rem;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}
.field__control:hover { border-color: #B9C9E2; }
.field__control:focus {
  outline: none;
  border-color: var(--cobalt);
  box-shadow: 0 0 0 3px rgba(20, 80, 210, 0.16);
}
.field__control::placeholder { color: #9FB1C8; }
.field__hint { margin-top: var(--s-2); font-size: var(--step--1); color: var(--ink-soft); }

.field__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
}

.checkline {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: var(--step--1);
  color: var(--ink-mid);
}
.checkline input { margin-top: 0.28rem; accent-color: var(--cobalt); }

.field__aside {
  font-size: var(--step--1);
  color: var(--ink-mid);
  text-decoration: none;
}
.field__aside:hover { color: var(--cobalt); text-decoration: underline; }

.panel__submit { margin-top: var(--s-6); }

.panel__alt {
  margin-top: var(--s-5);
  padding-top: var(--s-5);
  border-top: 1px solid var(--rule-soft);
  text-align: center;
  font-size: var(--step-0);
  color: var(--ink-mid);
}

.panel__legal {
  margin-top: var(--s-5);
  text-align: center;
  font-size: var(--step--2);
  color: var(--ink-soft);
  line-height: 1.55;
}

/* Notice pages — where the presentational buttons land. */
.notice {
  max-width: 560px;
  text-align: center;
}
.notice__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cobalt-deep);
  background: var(--sky);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  margin-bottom: var(--s-5);
}
.notice__title { font-size: var(--step-3); margin-bottom: var(--s-4); }
.notice__body { color: var(--ink-mid); margin-bottom: var(--s-6); }
.notice__actions { justify-content: center; }

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */

.footer {
  background: var(--ink);
  color: #B7C6DA;
  padding-block: var(--s-8) var(--s-6);
  font-size: var(--step-0);
}
.footer a { color: #DCE7F7; text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: underline; }

.footer__grid {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: minmax(0, 1.4fr) repeat(auto-fit, minmax(140px, 1fr));
  padding-bottom: var(--s-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer__brand { display: inline-flex; align-items: center; gap: 0.6rem; }
.footer__brand .brand__word { color: #fff; }
.footer__brand .brand__tld { color: #7FA6F0; }
.footer__blurb {
  margin-top: var(--s-4);
  color: #8FA2BC;
  font-size: var(--step--1);
  max-width: 34ch;
}
.footer__heading {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: #7FA6F0;
  margin-bottom: var(--s-4);
}
.footer__list li + li { margin-top: var(--s-3); }
.footer__list a { font-size: var(--step-0); }

@media (max-width: 760px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 420px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4);
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-5);
  font-size: var(--step--1);
  color: #7E90A9;
}
.footer__status { display: inline-flex; align-items: center; gap: var(--s-2); }
.footer__status .plate__dot { box-shadow: 0 0 0 3px rgba(11, 122, 87, 0.22); }

/* --------------------------------------------------------------------------
   12. Print — keep it legible, drop the furniture
   -------------------------------------------------------------------------- */

@media print {
  .masthead, .footer, .btn { display: none !important; }
  body { color: #000; font-size: 11pt; }
  .section { padding-block: 1rem; }
}