/* ==========================================================================
 * Probius: public frontispiece
 * Design language: "Chambers" (the app's own system, elevated for landing).
 * Cool graphite ink dominates; a single brass "seal" marks intent; hairline
 * rules and faint judicial lines replace heavy cards. Space Grotesk (display)
 * + Hanken Grotesk (text). Pure black/white never appear. Deliberately NOT the
 * warm-paper / Fraunces editorial of sibling apps.
 * ====================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Hanken+Grotesk:wght@400;500;600;700&display=swap");

/* ------------------------------------------------------------------ tokens */
:root {
  /* Ink: the brand. Cool graphite, never pure black. */
  --ink: #16161a;
  --ink-raised: #1f1f25;
  --ink-line: #2c2c34; /* hairlines drawn ON dark surfaces */
  --ink-soft: #3f3f46;
  --ink-mute: #6b6b75;

  /* Paper: cool off-white surfaces. */
  --paper: #f4f4f6;
  --paper-sink: #ececef;
  --surface: #ffffff;
  --line: #e5e5ea;
  --line-strong: #d3d3da;

  /* Seal: brass. Deep enough to carry on light, warm on dark. */
  --seal: #9a7322;
  --seal-ink: #b8893b;
  --seal-bright: #d9ab53;
  --seal-wash: #f6efdd;

  /* Semantic: used for data, not decoration. */
  --pos: #3f7a52;

  /* Fluid type scale (perfect-fourth-ish, tightened for display) */
  --fs-mega: clamp(2.9rem, 1.6rem + 5.4vw, 6.25rem);
  --fs-hero: clamp(2.3rem, 1.5rem + 3.3vw, 4rem);
  --fs-display: clamp(1.8rem, 1.3rem + 2vw, 2.9rem);
  --fs-section: clamp(1.35rem, 1.1rem + 1vw, 1.9rem);
  --fs-lead: clamp(1.0625rem, 1rem + 0.35vw, 1.3125rem);
  --fs-body: 1.0625rem;
  --fs-sm: 0.9375rem;
  --fs-xs: 0.8125rem;

  /* Rhythm */
  --gutter: clamp(1.25rem, 0.6rem + 3vw, 3rem);
  --wrap: 78rem;
  --section-y: clamp(4.5rem, 3rem + 7vw, 9rem);

  /* Motion */
  --ease-out-quart: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* Judicial rule lines: faint horizontal register drawn over paper. */
  --register: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 63px,
    color-mix(in oklab, var(--ink) 4%, transparent) 63px,
    color-mix(in oklab, var(--ink) 4%, transparent) 64px
  );
}

/* -------------------------------------------------------------------- reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}
body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: var(--fs-body);
  line-height: 1.6;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,
svg {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}
::selection {
  background: var(--seal-bright);
  color: var(--ink);
}
:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Cool, slim scrollbars to match the instrument feel. */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 99px;
  border: 3px solid var(--paper);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--ink);
  color: var(--surface);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  transition: top 0.2s var(--ease-out-quart);
}
.skip-link:focus {
  top: 1rem;
}

/* ---------------------------------------------------------------- typography */
.display {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.03;
  color: var(--ink);
  text-wrap: balance;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
}
.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: var(--seal);
}
.eyebrow--center::before {
  display: none;
}
.tnum {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}
.seal-text {
  color: var(--seal);
}

/* ------------------------------------------------------------------- layout */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

/* wordmark ------------------------------------------------------------------ */
.wm {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
}
.wm .ius {
  color: var(--seal);
}
.wm .dot {
  display: inline-block;
  width: 0.28em;
  height: 0.28em;
  margin-left: 0.12em;
  border-radius: 50%;
  background: var(--seal-bright);
  vertical-align: 0.5em;
}

/* buttons ------------------------------------------------------------------- */
.btn {
  --_bg: var(--ink);
  --_fg: var(--surface);
  --_bd: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.5rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: -0.01em;
  color: var(--_fg);
  background: var(--_bg);
  border: 1px solid var(--_bd);
  border-radius: 10px;
  transition:
    background-color 0.2s var(--ease-out-quart),
    border-color 0.2s var(--ease-out-quart),
    transform 0.2s var(--ease-out-quart),
    color 0.2s var(--ease-out-quart);
}
.btn:hover {
  background: var(--ink-raised);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn .arrow {
  transition: transform 0.25s var(--ease-out-expo);
}
.btn:hover .arrow {
  transform: translate(2px, -2px);
}
.btn--ghost {
  --_bg: transparent;
  --_fg: var(--ink);
  --_bd: var(--line-strong);
}
.btn--ghost:hover {
  background: transparent;
  border-color: var(--ink);
}
.btn--seal {
  --_bg: var(--seal);
  --_fg: #fffdf6;
  --_bd: var(--seal);
}
.btn--seal:hover {
  background: #8a651c;
  border-color: #8a651c;
}
.btn--onink {
  --_bg: var(--surface);
  --_fg: var(--ink);
  --_bd: var(--surface);
}
.btn--onink:hover {
  background: #ece9df;
  border-color: #ece9df;
}
.btn--sm {
  padding: 0.62rem 1.05rem;
  font-size: var(--fs-xs);
}

/* stamp: the little pre-launch chip, reads like a printed rubber stamp */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.8rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--seal);
  background: var(--seal-wash);
  border: 1px solid color-mix(in oklab, var(--seal) 26%, transparent);
  border-radius: 999px;
}
.stamp .pulse {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--seal-bright);
  box-shadow: 0 0 0 0 color-mix(in oklab, var(--seal-bright) 70%, transparent);
  animation: pulse 2.6s var(--ease-out-quart) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--seal-bright) 60%, transparent); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* =========================================================================
 * NAV
 * ====================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--paper) 82%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.3s var(--ease-out-quart),
    background-color 0.3s var(--ease-out-quart);
}
.nav[data-scrolled="true"] {
  border-bottom-color: var(--line);
  background: color-mix(in oklab, var(--paper) 92%, transparent);
}
.nav__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.75rem;
  gap: 1rem;
}
.nav__brand {
  font-size: 1.4rem;
  display: inline-block;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s var(--ease-out-quart);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 100%;
  height: 1px;
  background: var(--seal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-out-expo);
}
.nav__links a:hover {
  color: var(--ink);
}
.nav__links a:hover::after {
  transform: scaleX(1);
}
.nav__cta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.nav__login {
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ink);
}
.nav__login:hover {
  color: var(--seal);
}
.nav__toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.5rem;
  color: var(--ink);
}
.nav__toggle svg {
  width: 26px;
  height: 26px;
}

/* mobile drawer */
.nav__drawer {
  display: none;
}

/* =========================================================================
 * HERO: the frontispiece
 * ====================================================================== */
.hero {
  position: relative;
  padding-top: clamp(3rem, 2rem + 4vw, 6rem);
  padding-bottom: var(--section-y);
  overflow: hidden;
}
.hero__register {
  position: absolute;
  inset: 0;
  background: var(--register);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  pointer-events: none;
  z-index: 0;
}
.hero__wash {
  position: absolute;
  top: -14rem;
  right: -14rem;
  width: 42rem;
  height: 42rem;
  border-radius: 50%;
  background: radial-gradient(
    closest-side,
    color-mix(in oklab, var(--seal-bright) 20%, transparent),
    transparent
  );
  pointer-events: none;
  z-index: 0;
}
.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
}
.hero__copy {
  max-width: 40rem;
}
.hero h1 {
  margin: 1.6rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-hero);
  line-height: 1.02;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  color: var(--seal);
  /* Underline follows wrapping per-line: no nowrap, so it never overflows. */
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--seal-bright) 62%, transparent);
  text-decoration-thickness: 3px;
  text-underline-offset: 0.14em;
}
.hero__lead {
  margin: 1.6rem 0 0;
  font-size: var(--fs-lead);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 34rem;
  text-wrap: pretty;
}
.hero__actions {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}
.hero__meta {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  color: var(--ink-mute);
  font-size: var(--fs-sm);
}
.hero__meta .rule-v {
  width: 1px;
  height: 1.1rem;
  background: var(--line-strong);
}

/* the seal side */
.hero__seal {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 26rem;
}
.hero__seal .register-card {
  position: absolute;
  inset: 8% 4%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(color-mix(in oklab, var(--surface) 60%, transparent), color-mix(in oklab, var(--surface) 60%, transparent)),
    var(--register);
  box-shadow: 0 30px 60px -40px rgba(16, 16, 20, 0.35);
}
.hero__seal .register-card::before {
  content: "Exame de Ordem · Unificado";
  position: absolute;
  top: 1.1rem;
  left: 1.25rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.seal-mark {
  position: relative;
  width: clamp(13rem, 10rem + 12vw, 19rem);
  height: clamp(13rem, 10rem + 12vw, 19rem);
  animation: seal-rotate 60s linear infinite;
}
.seal-mark .ring-text {
  fill: var(--seal);
  font-family: "Space Grotesk", sans-serif;
  font-size: 8.1px;
  font-weight: 600;
  letter-spacing: 3.4px;
  text-transform: uppercase;
}
@keyframes seal-rotate {
  to { transform: rotate(360deg); }
}
.seal-core {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.seal-core .glyph {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(3.4rem, 2rem + 6vw, 5.5rem);
  letter-spacing: -0.04em;
  color: var(--ink);
  line-height: 1;
}
.seal-core .glyph .ius {
  color: var(--seal);
}

/* =========================================================================
 * LEDGER / INDEX STRIP: bordered grid, hairline gaps (echoes the app)
 * ====================================================================== */
.ledger {
  position: relative;
  z-index: 2;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 20px 50px -40px rgba(16, 16, 20, 0.3);
}
.ledger__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}
.ledger__cell {
  background: var(--surface);
  padding: 1.5rem 1.5rem 1.6rem;
}
.ledger__cell .k {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--seal);
}
.ledger__cell .v {
  margin-top: 0.7rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.05;
}
.ledger__cell .s {
  margin-top: 0.35rem;
  font-size: var(--fs-sm);
  color: var(--ink-mute);
}

/* =========================================================================
 * SECTION scaffolding
 * ====================================================================== */
.section {
  padding-block: var(--section-y);
}
.section__head {
  max-width: 44rem;
}
.section__head h2 {
  margin: 1.1rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-display);
  letter-spacing: -0.022em;
  line-height: 1.06;
  text-wrap: balance;
}
.section__head p {
  margin: 1.1rem 0 0;
  font-size: var(--fs-lead);
  color: var(--ink-soft);
  line-height: 1.55;
  max-width: 40rem;
}

/* =========================================================================
 * ARTICLES: features as articles of a code (§ 01-06)
 * ====================================================================== */
.articles {
  margin-top: clamp(2.5rem, 1.5rem + 3vw, 4rem);
  border-top: 1px solid var(--line);
}
.article {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(1rem, 0.4rem + 2vw, 3rem);
  padding-block: clamp(1.75rem, 1.2rem + 1.6vw, 2.75rem);
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.article__mark {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--seal);
  letter-spacing: 0.02em;
  padding-top: 0.35rem;
}
.article__mark span {
  display: block;
  color: var(--ink-mute);
  font-weight: 500;
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}
.article__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-section);
  letter-spacing: -0.018em;
  line-height: 1.12;
  color: var(--ink);
  margin: 0;
  transition: color 0.2s var(--ease-out-quart);
}
.article__body {
  margin: 0.4rem 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
  max-width: 40rem;
}
.article__tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
}
.article__tags li {
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--ink-soft);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
}
.article__tags li::before {
  content: "§ ";
  color: var(--seal);
}
.article:hover .article__title {
  color: var(--seal);
}

/* =========================================================================
 * MARQUEE: panel-ink (dark) section for the AI-graded 2nd phase
 * ====================================================================== */
.marquee {
  padding-block: var(--section-y);
}
.panel-ink {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--surface);
  border-radius: 22px;
  padding: clamp(2.25rem, 1.5rem + 3vw, 4.5rem);
}
.panel-ink__register {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 71px,
    rgba(255, 255, 255, 0.045) 71px,
    rgba(255, 255, 255, 0.045) 72px
  );
  pointer-events: none;
}
.panel-ink__wash {
  position: absolute;
  top: -10rem;
  left: -8rem;
  width: 34rem;
  height: 34rem;
  border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--seal-bright) 16%, transparent), transparent);
  pointer-events: none;
}
.panel-ink__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: center;
}
.panel-ink .eyebrow {
  color: var(--seal-bright);
}
.panel-ink .eyebrow::before {
  background: var(--seal-bright);
}
.panel-ink h2 {
  margin: 1.2rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-display);
  line-height: 1.05;
  letter-spacing: -0.022em;
  color: var(--surface);
  text-wrap: balance;
}
.panel-ink p {
  margin: 1.2rem 0 0;
  color: color-mix(in oklab, var(--surface) 74%, var(--ink));
  font-size: var(--fs-lead);
  line-height: 1.6;
  max-width: 32rem;
}
.panel-ink__points {
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}
.panel-ink__points li {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  color: color-mix(in oklab, var(--surface) 82%, var(--ink));
  font-size: var(--fs-sm);
}
.panel-ink__points li::before {
  content: "";
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--seal-bright);
  transform: translateY(-0.1rem);
}

/* the mock "correction" document */
.correction {
  position: relative;
  background: var(--surface);
  color: var(--ink);
  border-radius: 14px;
  padding: 1.5rem 1.6rem 1.75rem;
  box-shadow: 0 40px 80px -50px rgba(0, 0, 0, 0.6);
}
.correction__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.correction__label {
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.correction__score {
  display: inline-flex;
  align-items: baseline;
  gap: 0.2rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  color: var(--seal);
}
.correction__score b {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}
.correction__score span {
  font-size: 0.95rem;
  color: var(--ink-mute);
  font-weight: 500;
}
.criteria {
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}
.criteria li {
  display: grid;
  gap: 0.45rem;
}
.criteria .row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-size: var(--fs-sm);
}
.criteria .row .name {
  color: var(--ink-soft);
  font-weight: 500;
}
.criteria .row .pts {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  color: var(--ink);
}
.criteria .bar {
  height: 5px;
  border-radius: 99px;
  background: var(--paper-sink);
  overflow: hidden;
}
.criteria .bar > i {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: var(--seal);
  transform: scaleX(var(--fill, 0));
  transform-origin: left;
  transition: transform 1s var(--ease-out-expo);
}
.correction__note {
  margin: 1.25rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  line-height: 1.55;
}
.correction__note b {
  color: var(--ink);
  font-weight: 600;
}

/* =========================================================================
 * STUDY LOOP: Resolver · Corrigir · Analisar · Revisar
 * ====================================================================== */
.loop {
  margin-top: clamp(2.5rem, 1.5rem + 3vw, 4rem);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.loop__step {
  position: relative;
  background: var(--surface);
  padding: 1.75rem 1.5rem 1.9rem;
  transition: background-color 0.25s var(--ease-out-quart);
}
.loop__step:hover {
  background: var(--paper);
}
.loop__n {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  color: var(--seal);
}
.loop__step h3 {
  margin: 0.9rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
}
.loop__step p {
  margin: 0.55rem 0 0;
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  line-height: 1.55;
}
.loop__step .thread {
  position: absolute;
  top: 2.05rem;
  right: -0.5rem;
  color: var(--line-strong);
  z-index: 2;
}
.loop__step:last-child .thread {
  display: none;
}

/* =========================================================================
 * WAITLIST: early access (pre-launch; no pricing)
 * ====================================================================== */
.waitlist {
  padding-block: var(--section-y);
}
.waitlist__card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    linear-gradient(color-mix(in oklab, var(--surface) 82%, transparent), color-mix(in oklab, var(--surface) 82%, transparent)),
    var(--register);
  padding: clamp(2.25rem, 1.5rem + 3vw, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 1rem + 3vw, 4rem);
  align-items: center;
}
.waitlist__card::before {
  content: "";
  position: absolute;
  right: -8rem;
  bottom: -8rem;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in oklab, var(--seal-bright) 16%, transparent), transparent);
  pointer-events: none;
}
.waitlist__copy {
  position: relative;
}
.waitlist__copy h2 {
  margin: 1.1rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: var(--fs-display);
  letter-spacing: -0.022em;
  line-height: 1.06;
  text-wrap: balance;
}
.waitlist__copy p {
  margin: 1.1rem 0 0;
  color: var(--ink-soft);
  font-size: var(--fs-lead);
  line-height: 1.55;
  max-width: 32rem;
}
.form {
  position: relative;
}
.form__field {
  display: flex;
  gap: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 0.5rem 0.5rem 0.5rem 0.4rem;
  transition: border-color 0.2s var(--ease-out-quart), box-shadow 0.2s var(--ease-out-quart);
}
.form__field:focus-within {
  border-color: var(--seal);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--seal) 18%, transparent);
}
.form__field input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  padding: 0.65rem 0.75rem;
  font: inherit;
  font-size: var(--fs-body);
  color: var(--ink);
}
.form__field input::placeholder {
  color: var(--ink-mute);
}
.form__field input:focus {
  outline: none;
}
.form__field .btn {
  white-space: nowrap;
}
.form__hint {
  margin: 0.85rem 0 0;
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.form__hint svg {
  width: 15px;
  height: 15px;
  color: var(--seal);
  flex: none;
}
.form.is-done .form__field {
  display: none;
}
.form__done {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.15rem;
  background: color-mix(in oklab, var(--pos) 10%, var(--surface));
  border: 1px solid color-mix(in oklab, var(--pos) 35%, transparent);
  border-radius: 12px;
  color: color-mix(in oklab, var(--pos) 82%, var(--ink));
  font-weight: 500;
}
.form.is-done .form__done {
  display: flex;
  animation: rise 0.5s var(--ease-out-quart) both;
}
.form__done svg {
  width: 20px;
  height: 20px;
  flex: none;
  color: var(--pos);
}
.form__error {
  margin: 0.6rem 0 0;
  font-size: var(--fs-sm);
  color: #b04638;
  min-height: 1.2em;
}

/* =========================================================================
 * FOOTER
 * ====================================================================== */
.footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 2rem + 2vw, 4rem);
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  align-items: flex-start;
}
.footer__brand .wm {
  font-size: 1.5rem;
}
.footer__brand p {
  margin: 0.9rem 0 0;
  color: var(--ink-mute);
  font-size: var(--fs-sm);
  max-width: 22rem;
  line-height: 1.55;
}
.footer__cols {
  display: flex;
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  flex-wrap: wrap;
}
.footer__col h4 {
  margin: 0 0 0.9rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
}
.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}
.footer__col a {
  color: var(--ink-soft);
  font-size: var(--fs-sm);
  transition: color 0.2s var(--ease-out-quart);
}
.footer__col a:hover {
  color: var(--seal);
}
.footer__bottom {
  margin-top: clamp(2rem, 1.5rem + 2vw, 3.5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--ink-mute);
  font-size: var(--fs-xs);
}
.footer__bottom .locale {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: 0.04em;
}
.footer__bottom a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 2px;
  transition:
    color 0.2s var(--ease-out-quart),
    text-decoration-color 0.2s var(--ease-out-quart);
}
.footer__bottom a:hover {
  color: var(--seal);
  text-decoration-color: var(--seal);
}

/* =========================================================================
 * MOTION: one orchestrated load + scroll reveals
 * ====================================================================== */
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.7s var(--ease-out-expo),
    transform 0.7s var(--ease-out-expo);
  transition-delay: var(--delay, 0ms);
  will-change: opacity, transform;
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

.load-stagger > * {
  animation: rise 0.7s var(--ease-out-expo) both;
}
.load-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.load-stagger > *:nth-child(2) { animation-delay: 0.13s; }
.load-stagger > *:nth-child(3) { animation-delay: 0.21s; }
.load-stagger > *:nth-child(4) { animation-delay: 0.29s; }
.load-stagger > *:nth-child(5) { animation-delay: 0.37s; }

/* =========================================================================
 * RESPONSIVE
 * ====================================================================== */
@media (max-width: 1000px) {
  /* minmax(0, …): let single columns shrink below their content's min-content
     (a flex form field's intrinsic width would otherwise blow the track out). */
  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero__seal {
    order: -1;
    min-height: 20rem;
  }
  .panel-ink__grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .waitlist__card {
    grid-template-columns: minmax(0, 1fr);
  }
  .ledger__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .loop {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .loop__step .thread {
    display: none;
  }
}

@media (max-width: 720px) {
  .nav__links,
  .nav__login {
    display: none;
  }
  .nav__toggle {
    display: inline-flex;
  }
  .nav[data-open="true"] .nav__drawer {
    display: block;
  }
  .nav__drawer {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -30px rgba(16, 16, 20, 0.4);
    padding: 1rem var(--gutter) 1.5rem;
  }
  .nav__drawer ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
  }
  .nav__drawer a {
    display: block;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--line);
    font-family: "Space Grotesk", sans-serif;
    font-weight: 500;
    color: var(--ink);
  }
  .nav__drawer .btn {
    margin-top: 1rem;
    width: 100%;
  }

  .article {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  .article__mark {
    padding-top: 0;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
  }
  .article__mark span {
    margin-top: 0;
  }

  .ledger__grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .loop {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero__actions .btn {
    flex: 1 1 auto;
  }
}

/* Narrow phones: stack the waitlist field so the button gets full width. */
@media (max-width: 520px) {
  .form__field {
    flex-direction: column;
    align-items: stretch;
    padding: 0.55rem;
    gap: 0.5rem;
  }
  .form__field .btn {
    justify-content: center;
  }
}

/* =========================================================================
 * REDUCED MOTION
 * ====================================================================== */
@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;
  }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .seal-mark {
    animation: none;
  }
}