/* ==========================================================================
   99.do — specimen sheet
   Type: Archivo (grotesque) + Newsreader (serif italic)
   Ink on paper. Hairlines carry the structure. One accent, used sparingly.
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */
:root {
  color-scheme: light;
  --paper: #e9e7e0;
  --paper-deep: #dedbd2;
  --ink: #101010;
  --ink-body: #33312b;
  --ink-soft: #5f5c52;
  --ink-faint: #7c796d;
  --rule: #c7c4b8;
  --accent: #2a22e6;

  --sans: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;

  --fs-display: clamp(74px, 43vw, 660px);
  --fs-builder: clamp(34px, 5.8vw, 80px);
  --fs-lede: clamp(23px, 2.35vw, 36px);
  --fs-sub: clamp(16px, 1.3vw, 20px);
  --fs-body: clamp(15px, 1.02vw, 17px);
  --fs-micro: 12.5px;

  --max: 1560px;
  --pad: clamp(20px, 4.2vw, 64px);
  --gutter: clamp(16px, 2vw, 32px);

  --ease: cubic-bezier(0.16, 0.84, 0.28, 1);
}

/* 2. Reset ----------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  position: relative;
  margin: 0;
  overflow-x: clip;
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23grain)' opacity='0.055'/%3E%3C/svg%3E");
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
p,
dl,
dd,
dt {
  margin: 0;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

a,
button,
input {
  -webkit-tap-highlight-color: transparent;
}

a,
button {
  touch-action: manipulation;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-160%);
}

.skip:focus-visible {
  transform: none;
}

/* 3. Layout ---------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-left: max(var(--pad), env(safe-area-inset-left));
  padding-right: max(var(--pad), env(safe-area-inset-right));
}

.rule {
  height: 1px;
  background: var(--rule);
}

/* 4. Registration marks ---------------------------------------------------- */
.marks {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.marks i {
  position: absolute;
  display: block;
  width: 15px;
  height: 15px;
  opacity: 0.6;
}

.marks i::before,
.marks i::after {
  content: "";
  position: absolute;
  background: var(--rule);
}

.marks i::before {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
}

.marks i::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
}

.marks i:nth-child(1) { top: 17px; left: 17px; }
.marks i:nth-child(2) { top: 17px; right: 17px; }
.marks i:nth-child(3) { bottom: 17px; left: 17px; }
.marks i:nth-child(4) { bottom: 17px; right: 17px; }

/* 5. Masthead -------------------------------------------------------------- */
.masthead {
  border-bottom: 1px solid var(--rule);
}

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  gap: var(--gutter);
  padding-block: clamp(16px, 2.4vh, 24px);
}

.mark {
  justify-self: start;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.mark:hover {
  color: var(--accent);
}

.mark__do {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.06em;
  letter-spacing: 0;
}

.masthead__status {
  font-size: var(--fs-micro);
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  text-align: center;
}

.masthead__mail {
  justify-self: end;
  display: inline-flex;
  align-items: baseline;
  gap: 0.3em;
  font-family: var(--serif);
  font-style: italic;
  font-size: 16.5px;
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.masthead__mail span {
  font-family: var(--sans);
  font-style: normal;
  font-size: 0.78em;
  color: var(--accent);
  transition: transform 0.24s var(--ease);
}

.masthead__mail:hover {
  color: var(--accent);
}

.masthead__mail:hover span {
  transform: translate(2px, -2px);
}

/* 6. Hero ------------------------------------------------------------------ */
.hero {
  padding-block: clamp(16px, 2.8vh, 32px) clamp(26px, 3.4vh, 44px);
}

.title {
  margin-left: -0.035em;
  font-size: var(--fs-display);
  font-weight: 900;
  font-stretch: 88%;
  line-height: 0.8;
  letter-spacing: -0.055em;
  white-space: nowrap;
}

.title__num,
.title__do {
  display: inline-block;
}

.title__do {
  margin-left: 0.03em;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 0.42em;
  line-height: 1;
  letter-spacing: -0.03em;
  vertical-align: baseline;
}

.rule--hero {
  margin-top: clamp(4px, 0.5vw, 8px);
  transform-origin: 0 50%;
}

.hero__base {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
  padding-top: clamp(20px, 2.8vh, 32px);
}

.hero__lede {
  grid-column: 1 / span 5;
}

.lede {
  margin-bottom: 0.55em;
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--fs-lede);
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.prose {
  max-width: 44ch;
  font-size: var(--fs-body);
  line-height: 1.62;
  color: var(--ink-body);
}

.hero__actions {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  align-items: center;
  justify-content: start;
  gap: 14px 26px;
  grid-column: 7 / span 5;
  align-content: start;
  padding-left: var(--gutter);
  border-left: 1px solid var(--rule);
}

.hero__actions .fineprint {
  grid-column: 1 / -1;
}

.fineprint {
  max-width: 34ch;
  font-size: var(--fs-micro);
  line-height: 1.45;
  color: var(--ink-soft);
}

/* 7. Buttons and links ----------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  min-height: 52px;
  padding: 0 26px;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--ink);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.005em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.btn:active {
  background: var(--ink);
  border-color: var(--ink);
}

.btn--ghost {
  min-width: 186px;
  background: transparent;
  border-color: var(--rule);
  color: var(--ink);
}

.btn--ghost:hover,
.btn--ghost:not([aria-disabled="true"]):active {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn--ghost[aria-disabled="true"] {
  border-color: var(--rule);
  color: var(--ink-faint);
  cursor: not-allowed;
}

.btn--ghost[aria-disabled="true"]:hover {
  border-color: var(--rule);
  color: var(--ink-faint);
}

.btn__tick {
  font-size: 0.9em;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.18s var(--ease);
}

.btn.is-copied {
  border-color: var(--accent);
}

.btn.is-copied .btn__tick {
  opacity: 1;
}

.link {
  display: inline-block;
  padding-block: 7px;
  font-size: 14px;
  line-height: 1.4;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: currentColor;
  text-underline-offset: 0.24em;
  transition: color 0.18s var(--ease);
}

.link:hover {
  color: var(--accent);
}

.link--accent {
  color: var(--accent);
}

.link--accent:hover {
  color: var(--ink);
}

/* 8. Address builder ------------------------------------------------------- */
.band {
  padding-block: clamp(26px, 4.4vh, 46px) clamp(24px, 4vh, 40px);
  border-block: 1px solid var(--rule);
  background-color: var(--paper-deep);
  scroll-margin-top: 20px;
}

.band__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 24px;
}

.band__title {
  font-size: clamp(18px, 1.55vw, 22px);
  font-weight: 600;
  letter-spacing: -0.012em;
}

.band__sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--fs-sub);
  color: var(--ink-soft);
}

.builder {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px 40px;
  margin-top: clamp(14px, 2.4vh, 24px);
}

.builder__note {
  display: none;
  max-width: 32ch;
  font-size: var(--fs-micro);
  line-height: 1.45;
  color: var(--ink-soft);
}

.builder__label {
  display: block;
  margin-bottom: clamp(4px, 0.8vh, 8px);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.builder__field {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  font-size: var(--fs-builder);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.builder__mirror {
  position: absolute;
  visibility: hidden;
  white-space: pre;
  pointer-events: none;
}

/* Focus reads as a printed form rule: a full-width accent bar under the line. */
.builder__field::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -12px;
  left: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.16s var(--ease);
  pointer-events: none;
}

.builder__field:has(.builder__input:focus-visible)::after {
  opacity: 1;
}

.builder__input {
  width: 8ch;
  max-width: 100%;
  margin: 0;
  padding: 0 0 0.08em;
  border: 0;
  border-bottom: 2px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  letter-spacing: inherit;
  -webkit-appearance: none;
  appearance: none;
}

.builder__input::placeholder {
  color: var(--ink-faint);
  font-weight: 400;
  opacity: 1;
}

.builder__input:focus {
  outline: none;
}

.builder__input:focus-visible {
  border-bottom-color: var(--accent);
}

/* Fallback for browsers without :has() — draw the ring on the field itself. */
@supports not selector(:has(*)) {
  .builder__input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 6px;
  }
}

.builder__at {
  padding-bottom: 0.08em;
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
  letter-spacing: -0.04em;
}

.builder__hint {
  margin-top: 14px;
  font-size: var(--fs-micro);
  color: var(--ink-soft);
}

.band__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  margin-top: clamp(20px, 3vh, 30px);
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.band__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 28px;
}

.band__hint {
  font-size: var(--fs-micro);
  color: var(--ink-soft);
}

/* 9. Colophon -------------------------------------------------------------- */
.colophon {
  padding-block: clamp(32px, 5vh, 60px) 22px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding-top: 4px;
  border-top: 1px solid var(--rule);
}

.fact {
  padding: 16px 24px 0;
  border-left: 1px solid var(--rule);
}

.fact:first-child {
  padding-left: 0;
  border-left: 0;
}

.fact dt {
  margin-bottom: 8px;
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.fact dd {
  max-width: 28ch;
  font-size: clamp(14px, 0.95vw, 16px);
  line-height: 1.5;
  color: var(--ink-body);
}

.fact code {
  font-family: inherit;
  font-weight: 600;
  color: var(--ink);
}

.colophon__base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: clamp(28px, 4.2vh, 44px);
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: var(--fs-micro);
  color: var(--ink-soft);
}

/* 10. Entrance: one sequence, then stillness ------------------------------- */
.js .title__num,
.js .title__do {
  clip-path: inset(-30% 100% -30% 0);
  transition: clip-path 900ms var(--ease);
}

.js .title__num {
  transition-delay: 60ms;
}

.js .title__do {
  transition-delay: 200ms;
}

.js .rule--hero {
  transform: scaleX(0);
  transition: transform 900ms var(--ease) 380ms;
}

.js .hero__lede,
.js .hero__actions {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms var(--ease) 520ms, transform 700ms var(--ease) 520ms;
}

.js.is-ready .title__num,
.js.is-ready .title__do {
  clip-path: inset(-30% -4% -30% 0);
}

.js.is-ready .rule--hero {
  transform: scaleX(1);
}

.js.is-ready .hero__lede,
.js.is-ready .hero__actions {
  opacity: 1;
  transform: none;
}

/* 11. Responsive ----------------------------------------------------------- */
@media (min-width: 900px) {
  .builder {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: end;
  }

  .builder__note {
    display: block;
    justify-self: end;
    max-width: 100%;
    padding-bottom: 0.5em;
    text-align: right;
    text-wrap: balance;
  }
}

@media (max-width: 1080px) {
  .hero__base {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  .hero__lede,
  .hero__actions {
    grid-column: 1 / -1;
  }

  .hero__actions {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 960px) {
  .masthead__inner {
    grid-template-columns: 1fr auto;
  }

  .masthead__status {
    display: none;
  }

  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .fact:nth-child(2n + 1) {
    padding-left: 0;
    border-left: 0;
  }

  .fact:nth-child(n + 3) {
    margin-top: 4px;
    padding-top: 20px;
    border-top: 1px solid var(--rule);
  }

  .marks {
    display: none;
  }
}

@media (max-width: 560px) {
  .facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .fact {
    padding-right: 0;
    padding-left: 0;
    border-left: 0;
  }

  .fact:nth-child(n + 2) {
    margin-top: 0;
    padding-top: 16px;
    border-top: 1px solid var(--rule);
  }

  .fact:nth-child(n + 3) {
    margin-top: 0;
  }

  .fact dd {
    max-width: none;
  }

  .band__foot {
    flex-direction: column;
    align-items: stretch;
  }

  .band__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .band__actions .btn {
    width: 100%;
  }

  .band__actions .link {
    align-self: flex-start;
  }

  .hero__actions {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__actions .btn {
    width: 100%;
  }

  .hero__actions .link {
    justify-self: start;
  }

  .colophon__base {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 12. Reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js.is-ready .title__num,
  .js.is-ready .title__do {
    clip-path: none;
  }

  .js .rule--hero {
    transform: none;
  }

  .js .hero__lede,
  .js .hero__actions {
    opacity: 1;
    transform: none;
  }
}