/* ============================================================
   DIA SOFT — design system
   Palette: warm paper / near-black ink. No accent color.
   Type: Switzer (variable) + Sentient italic (editorial accent).
   ============================================================ */

@font-face {
  font-family: 'Switzer';
  src: url('/assets/fonts/Switzer-Variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Sentient';
  src: url('/assets/fonts/Sentient-VariableItalic.woff2') format('woff2');
  font-weight: 200 700;
  font-style: italic;
  font-display: swap;
}

:root {
  --paper: #f3f1ec;
  --paper-deep: #eae7e0;
  --ink: #131311;
  --ink-soft: #5b5850;
  --ink-faint: #6a665c;
  --line: rgba(19, 19, 17, 0.16);
  --line-strong: rgba(19, 19, 17, 0.4);
  --paper-on-ink: #f3f1ec;
  --soft-on-ink: rgba(243, 241, 236, 0.62);
  --line-on-ink: rgba(243, 241, 236, 0.18);

  --font-sans: 'Switzer', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-serif: 'Sentient', Georgia, 'Times New Roman', serif;

  --shell-max: 1280px;
  --shell-pad: clamp(1.25rem, 4.5vw, 4rem);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

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

#main, #move, #beyond, #ventures, #founder, #contact {
  scroll-margin-top: 5rem;
}

body {
  font-family: var(--font-sans);
  font-weight: 420;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01' on;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

.shell {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-left: var(--shell-pad);
  padding-right: var(--shell-pad);
}

/* ---------- shared type ---------- */
.serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 420;
  letter-spacing: 0;
}

.kicker,
.section-label {
  font-size: 0.72rem;
  font-weight: 550;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  border-top: 1px solid var(--line-strong);
  padding-top: 1.1rem;
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

/* ---------- links & buttons ---------- */
.link-underline {
  position: relative;
  font-weight: 500;
  white-space: nowrap;
}
.link-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transition: transform 0.35s var(--ease-out);
}
.link-underline:hover::after { transform: scaleX(0.35); }

.link-plain {
  font-weight: 500;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: border-color 0.25s ease;
}
.link-plain:hover { border-color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 520;
  letter-spacing: 0.01em;
  padding: 0.95rem 1.9rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s var(--ease-out);
}
.btn--ink {
  background: var(--ink);
  color: var(--paper);
}
.btn--ink:hover {
  background: transparent;
  color: var(--ink);
}
.btn:active { transform: scale(0.98); }

/* ---------- header ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 4.25rem;
}

.wordmark {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.site-nav {
  display: flex;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  font-size: 0.9rem;
  font-weight: 480;
}
.site-nav a {
  color: var(--ink-soft);
  transition: color 0.2s ease;
}
.site-nav a:hover { color: var(--ink); }

.btn--header {
  font-size: 0.85rem;
  padding: 0.6rem 1.25rem;
}

/* ---------- hero ---------- */
.hero {
  padding-top: clamp(9rem, 22vh, 13rem);
  padding-bottom: clamp(4rem, 10vh, 7rem);
}

.hero .kicker { margin-bottom: clamp(1.5rem, 3.5vw, 2.5rem); }

.hero-title {
  font-size: clamp(3.05rem, 10.5vw, 9.2rem);
  font-weight: 640;
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  text-wrap: balance;
}
.hero-title .line { display: block; }

.hero-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 3rem;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  flex-wrap: wrap;
}

.hero-sub {
  max-width: 34rem;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink-soft);
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

/* ---------- statement (positioning) ---------- */
.statement {
  border-top: 1px solid var(--line);
  padding: clamp(4.5rem, 11vw, 8.5rem) 0;
}

.statement-big {
  font-size: clamp(1.8rem, 4.4vw, 3.6rem);
  font-weight: 560;
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 46rem;
}

.statement-sub {
  margin-top: clamp(1.75rem, 3.5vw, 2.75rem);
  max-width: 36rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

/* ---------- what we can move ---------- */
.move { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }

.move-list { border-bottom: 1px solid var(--line); }

.move-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr 1.4fr;
  gap: clamp(1.25rem, 3vw, 3rem);
  align-items: baseline;
  padding: clamp(1.6rem, 3.2vw, 2.4rem) 0;
  border-top: 1px solid var(--line);
  transition: border-color 0.3s ease;
}
.move-row:hover { border-top-color: var(--line-strong); }

.move-num {
  font-size: 0.8rem;
  font-weight: 480;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.move-name {
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  font-weight: 590;
  letter-spacing: -0.02em;
  line-height: 1.05;
  transition: transform 0.35s var(--ease-out);
}
.move-row:hover .move-name { transform: translateX(6px); }

.move-desc {
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 34rem;
}

.move-note {
  margin-top: clamp(2rem, 4.5vw, 3.25rem);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 500;
}

/* ---------- beyond technology ---------- */
.beyond {
  background: var(--paper-deep);
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(4.5rem, 10vw, 8rem);
}
.beyond .section-head { border-top-color: var(--line-strong); }

.beyond-big {
  font-size: clamp(2rem, 5.2vw, 4.4rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  max-width: 56rem;
}
.beyond-big .serif { text-transform: none; }

.beyond-sub {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  max-width: 34rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.domains {
  margin-top: clamp(2.75rem, 6vw, 4.5rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 480;
}
.domains li {
  display: flex;
  align-items: center;
}
.domains li:not(:last-child)::after {
  content: '/';
  margin: 0 clamp(0.7rem, 1.6vw, 1.2rem);
  color: var(--ink-faint);
  font-weight: 300;
}
.domains-else { font-weight: 550; }

/* ---------- ventures ---------- */
.ventures { padding: clamp(4rem, 9vw, 7rem) 0; }

.venture {
  border: 1px solid var(--line-strong);
  padding: clamp(1.75rem, 4vw, 3rem);
  max-width: 44rem;
}

.venture-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.venture-name {
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight: 610;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.venture-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 540;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.venture-meta {
  margin-top: 0.85rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.venture-desc {
  margin-top: clamp(1.25rem, 2.5vw, 1.75rem);
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.55;
  max-width: 36rem;
}

.venture-foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.venture-credit {
  font-size: 0.85rem;
  font-weight: 520;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ---------- philosophy (inverted) ---------- */
.philosophy {
  background: var(--ink);
  color: var(--paper-on-ink);
  padding: clamp(5rem, 12vw, 9.5rem) 0;
}

.philosophy-big {
  font-size: clamp(2.6rem, 7.5vw, 6.4rem);
  font-weight: 630;
  line-height: 1.0;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
.philosophy-big .line { display: block; }
.philosophy-big .serif { text-transform: none; }

.philosophy-sub {
  margin-top: clamp(2.5rem, 5.5vw, 4rem);
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  line-height: 1.7;
  color: var(--soft-on-ink);
  max-width: 34rem;
}

.philosophy-final {
  margin-top: 1.1rem;
  color: var(--paper-on-ink);
  font-weight: 560;
}

/* ---------- founder ---------- */
.founder { padding: clamp(4rem, 9vw, 7rem) 0; }

.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.founder-name {
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  font-weight: 620;
  letter-spacing: -0.025em;
  line-height: 1.02;
  text-transform: uppercase;
}

.founder-role {
  margin-top: 0.9rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
}

.founder-tags {
  margin-top: 1.4rem;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.founder-copy {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.6;
  color: var(--ink-soft);
  display: grid;
  gap: 1.1rem;
  max-width: 34rem;
}
.founder-copy p:first-child { color: var(--ink); }

/* ---------- contact ---------- */
.contact {
  background: var(--ink);
  color: var(--paper-on-ink);
  padding: clamp(5rem, 11vw, 8.5rem) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}

.contact-big {
  font-size: clamp(2.4rem, 5.8vw, 4.8rem);
  font-weight: 620;
  line-height: 1.02;
  letter-spacing: -0.028em;
  text-transform: uppercase;
  text-wrap: balance;
}
.contact-big .serif { text-transform: none; }

.contact-sub {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--soft-on-ink);
}

.contact-form {
  display: grid;
  gap: 1.6rem;
}

.field { display: grid; gap: 0.5rem; }

.field label {
  font-size: 0.72rem;
  font-weight: 540;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft-on-ink);
}

.field input,
.field textarea {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 450;
  color: var(--paper-on-ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(243, 241, 236, 0.4);
  border-radius: 0;
  padding: 0.55rem 0 0.7rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--paper-on-ink);
  box-shadow: 0 1px 0 0 var(--paper-on-ink);
}
.field input:hover,
.field textarea:hover { border-bottom-color: rgba(243, 241, 236, 0.6); }

.field--hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-error {
  font-size: 0.95rem;
  color: #e8b4a8;
}

.form-note {
  font-size: 0.82rem;
  color: var(--soft-on-ink);
}

.btn--submit {
  justify-self: start;
  margin-top: 0.4rem;
  background: var(--paper-on-ink);
  color: var(--ink);
  border-color: var(--paper-on-ink);
}
.btn--submit:hover {
  background: transparent;
  color: var(--paper-on-ink);
}
.btn--submit[disabled] {
  opacity: 0.55;
  pointer-events: none;
}

.contact-success { padding-top: 0.5rem; }
.contact-success:focus { outline: none; }
.success-big {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 620;
  letter-spacing: -0.02em;
}
.success-sub {
  margin-top: 0.75rem;
  font-size: 1.15rem;
  color: var(--soft-on-ink);
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper-on-ink);
  border-top: 1px solid var(--line-on-ink);
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 4vw, 3rem);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.footer-wordmark {
  font-size: clamp(3.4rem, 13vw, 11rem);
  font-weight: 680;
  letter-spacing: -0.02em;
  line-height: 0.9;
  color: rgba(243, 241, 236, 0.1);
  -webkit-user-select: none;
  user-select: none;
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--soft-on-ink);
}

/* ---------- reveal animation ----------
   Hidden state is gated on the .js class set by boot.js, so the page
   stays fully visible when JavaScript is unavailable. */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}
.js .move-row.reveal {
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out), border-color 0.3s ease;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .status-dot { animation: none; }
  * { transition-duration: 0.01ms !important; }
}

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .move-row {
    grid-template-columns: 2.6rem 1fr;
    grid-template-rows: auto auto;
    row-gap: 0.6rem;
  }
  .move-desc { grid-column: 2; }

  .founder-grid,
  .contact-grid { grid-template-columns: 1fr; }

  .hero-foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 2.25rem;
  }
}

@media (max-width: 640px) {
  .site-nav { display: none; }
  .btn--header { font-size: 0.8rem; padding: 0.55rem 1.1rem; }

  .hero { padding-top: 7.5rem; }
  .hero-title { font-size: clamp(2.7rem, 14vw, 4.5rem); }

  .venture { padding: 1.5rem 1.25rem; }
  .venture-top { flex-direction: column; gap: 0.75rem; }

  .footer-meta { flex-direction: column; gap: 0.4rem; }
}