/* Hallmark · macrostructure: Bento Grid · H2 Split Diptych knobs: ratio=7/5, right=proof column, divider=negative-space
 * theme: custom · vibe: "dark instrument-panel, electric-blue signal, enterprise precision" · paper: oklch(13% 0.014 229) · accent: oklch(64% 0.19 229)
 * display: Geist 700 · body: Geist 400 · mono: Geist Mono · axes: dark / geometric-sans / cool
 * nav: N1b SaaS three-section · footer: Ft5 Statement · F1 Bento knobs: tiles=8, spans=irregular, accent=corner-only
 * studied: no · context: explicit · pre-emit critique: P4 H4 E4 S4 R4 V4
 */

@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink-2);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  font-weight: 700;
  font-style: normal;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
}

p { margin: 0; max-width: 65ch; }

a { color: inherit; text-decoration: none; }

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

.mono {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--text-xs);
}

/* ---------------------------------- Buttons ---------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              transform 100ms var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }

.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover:not([disabled]) { background: oklch(from var(--color-accent) calc(l + 0.05) c h); transform: translateY(-1.5px); }
}
.btn--primary[data-state="loading"] { pointer-events: none; }
.btn--primary .btn__spinner { display: none; width: 1em; height: 1em; border-radius: 50%; border: 2px solid color-mix(in oklch, var(--color-accent-ink) 30%, transparent); border-top-color: var(--color-accent-ink); animation: spin 700ms linear infinite; }
.btn--primary[data-state="loading"] .btn__spinner { display: inline-block; }
.btn--primary[data-state="success"] { background: var(--color-signal); color: var(--color-signal-ink); }
.btn--primary[data-state="success"] .btn__spinner { display: none; }
.btn--primary[data-state="error"] { background: var(--color-error); color: var(--color-error-ink); }

@keyframes spin { to { transform: rotate(360deg); } }

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-rule);
  color: var(--color-ink);
}
@media (hover: hover) and (pointer: fine) {
  .btn--outline:hover { border-color: var(--color-ink-2); background: var(--color-paper-2); transform: translateY(-1.5px); }
}

.btn--text {
  color: var(--color-ink-2);
  padding-inline: 0.25rem;
}
@media (hover: hover) and (pointer: fine) {
  .btn--text:hover { color: var(--color-ink); }
}

/* ---------------------------------- Nav (N1b) ---------------------------------- */

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-sticky);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 240ms, border-color 240ms;
}
.nav.is-scrolled {
  background: color-mix(in oklch, var(--color-paper) 78%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--color-rule);
}
.nav__inner {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
  height: 68px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}
.nav__brand { justify-self: start; display: inline-flex; align-items: baseline; gap: 0.5em; font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); letter-spacing: -0.02em; color: var(--color-ink); }
.nav__brand-dot { width: 0.4em; height: 0.4em; border-radius: 50%; background: var(--color-accent); display: inline-block; align-self: center; }
.nav__brand-word { display: inline-flex; align-items: baseline; }
.nav__brand-suffix { font-family: var(--font-mono); font-weight: 500; font-size: 0.5em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); margin-left: 0.2em; }
.nav__center { justify-self: center; display: flex; gap: var(--space-lg); }
.nav__link { font-size: var(--text-sm); color: var(--color-ink-2); white-space: nowrap; padding-block: 0.4rem; position: relative; }
.nav__link::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--color-accent); transform: scaleX(0); transform-origin: left; transition: transform var(--dur-short) var(--ease-out); }
@media (hover: hover) and (pointer: fine) {
  .nav__link:hover { color: var(--color-ink); }
  .nav__link:hover::after { transform: scaleX(1); }
}
.nav__right { justify-self: end; display: flex; align-items: center; gap: var(--space-md); }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}
.nav__toggle-bar {
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__sheet {
  display: none;
  flex-direction: column;
  padding-inline: var(--page-gutter);
  background: var(--color-paper);
  border-bottom: 1px solid transparent;
}
.nav__sheet.is-open {
  display: flex;
  border-bottom-color: var(--color-rule);
  padding-block: var(--space-sm) var(--space-md);
}
.nav__sheet a {
  padding-block: var(--space-sm);
  font-size: var(--text-base);
  color: var(--color-ink-2);
  border-bottom: 1px solid var(--color-rule);
}
.nav__sheet a:last-child { border-bottom: none; }
.nav__sheet .nav__sheet-cta {
  border-bottom: none;
  justify-content: center;
  width: 100%;
  margin-top: var(--space-sm);
  padding: 0.75rem 1.4rem;
  color: var(--color-accent-ink);
}

@media (max-width: 56.25rem) {
  .nav__center { display: none; }
  .nav__inner { grid-template-columns: 1fr auto 1fr; }
  .nav__brand { grid-column: 2; justify-self: center; }
  .nav__right { grid-column: 1; justify-self: start; }
  .nav__right .btn--primary { display: none; }
  .nav__toggle { display: flex; }
}

/* ---------------------------------- Hero (H2 Split Diptych) ---------------------------------- */

.hero {
  padding-block: calc(68px + var(--space-3xl)) var(--space-3xl);
}
.hero-split {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-2xl);
  align-items: start;
}
.hero__title {
  font-size: var(--text-display);
  max-width: 15ch;
}
.hero__lede {
  margin-top: var(--space-lg);
  font-size: var(--text-md);
  color: var(--color-ink-2);
  max-width: 46ch;
}
.hero__ctas {
  margin-top: var(--space-xl);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.hero__meta {
  margin-top: var(--space-lg);
  font-size: var(--text-xs);
  color: var(--color-muted);
}

.credential-card {
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-lg);
  background: var(--color-paper-2);
  padding: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}
.credential-card__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-signal);
}
.credential-card__status-dot {
  width: 0.5em; height: 0.5em; border-radius: 50%; background: var(--color-signal);
  animation: pulse-dot 2.4s var(--ease-in-out) infinite;
}
@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.credential-card__role { font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); color: var(--color-ink); }
.credential-card__org { color: var(--color-ink-2); font-size: var(--text-sm); }
.credential-card__list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-sm); border-top: 1px solid var(--color-rule); padding-top: var(--space-lg); }
.credential-card__list li { display: flex; gap: var(--space-sm); font-size: var(--text-sm); color: var(--color-ink-2); }
.credential-card__list li::before { content: "→"; color: var(--color-accent); flex-shrink: 0; }

@media (max-width: 56.25rem) {
  .hero-split { grid-template-columns: 1fr; }
}

/* ---------------------------------- Section heads (S2 Hanging) ---------------------------------- */

.head-hang {
  padding-block: var(--space-3xl) var(--space-xl);
  max-width: 42ch;
}
.head-hang h2 { font-size: var(--text-display-s); }
.head-hang p { margin-top: var(--space-md); color: var(--color-ink-2); font-size: var(--text-md); }

section { padding-inline: var(--page-gutter); }
.section-inner { max-width: var(--page-max); margin-inline: auto; }
.section--tight .head-hang { padding-block: var(--space-2xl) var(--space-lg); }

/* ---------------------------------- Founder / trust ---------------------------------- */

.founder {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-2xl);
  padding-block-end: var(--space-3xl);
  align-items: start;
}
.founder__bio p + p { margin-top: var(--space-md); }
.founder__bio { color: var(--color-ink-2); font-size: var(--text-md); }
.founder__facts {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-rule);
}
.founder__fact {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-lg);
  padding-block: var(--space-md);
  border-bottom: 1px solid var(--color-rule);
}
.founder__fact dt { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); margin: 0; }
.founder__fact dd { margin: 0; color: var(--color-ink); font-size: var(--text-base); }

@media (max-width: 56.25rem) {
  .founder { grid-template-columns: 1fr; }
  .founder__fact { grid-template-columns: 6.5rem 1fr; }
}

/* ---------------------------------- Problem panels (asymmetric, no icon-tile) ---------------------------------- */

.problem-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.85fr;
  gap: 0;
  border-top: 1px solid var(--color-rule);
  padding-block-end: var(--space-3xl);
}
.problem-panel {
  padding: var(--space-xl) var(--space-lg);
  border-inline-end: 1px solid var(--color-rule);
}
.problem-panel:last-child { border-inline-end: none; }
.problem-panel__tag { color: var(--color-accent); }
.problem-panel h3 { margin-top: var(--space-md); font-size: var(--text-lg); max-width: 20ch; }
.problem-panel p { margin-top: var(--space-sm); color: var(--color-ink-2); font-size: var(--text-sm); }

@media (max-width: 56.25rem) {
  .problem-grid { grid-template-columns: 1fr; }
  .problem-panel { border-inline-end: none; border-bottom: 1px solid var(--color-rule); }
  .problem-panel:last-child { border-bottom: none; }
}

/* ---------------------------------- Wedge — Bento grid (F1) ---------------------------------- */

.bento {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: minmax(11rem, auto);
  grid-auto-flow: dense;
  gap: var(--space-md);
  padding-block-end: var(--space-3xl);
}
.cell {
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  background: var(--color-paper-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 0;
}
.cell--accent { border-color: color-mix(in oklch, var(--color-accent) 45%, var(--color-rule)); }
.span-2x2 { grid-column: span 2; grid-row: span 2; }
.span-2x1 { grid-column: span 2; }
.span-1x2 { grid-row: span 2; }

.cell__label { color: var(--color-muted); }
.cell__title { font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); color: var(--color-ink); }
.cell__body { color: var(--color-ink-2); font-size: var(--text-sm); }
.cell__list { list-style: none; margin: var(--space-xs) 0 0; padding: 0; display: grid; gap: var(--space-2xs); font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-2); }
.cell__list li::before { content: "· "; color: var(--color-accent); }
.cell__spacer { flex: 1; }
.cell__chip { align-self: flex-start; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em; text-transform: uppercase; padding: 0.3rem 0.6rem; border-radius: 999px; background: color-mix(in oklch, var(--color-signal) 16%, var(--color-paper-2)); color: var(--color-signal); }

@media (max-width: 56.25rem) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-2x2, .span-2x1 { grid-column: span 2; }
}
@media (max-width: 32rem) {
  .bento { grid-template-columns: 1fr; }
  .span-2x2, .span-2x1, .span-1x2 { grid-column: span 1; grid-row: span 1; }
}

/* ---------------------------------- Prasang differentiator ---------------------------------- */

.differentiator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  padding-block-end: var(--space-3xl);
}
.differentiator__copy p + p { margin-top: var(--space-md); }
.differentiator__copy { color: var(--color-ink-2); font-size: var(--text-md); }
.differentiator__copy strong { color: var(--color-ink); font-weight: 700; }

.context-tile {
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-2);
  overflow: hidden;
}
.context-tile__row { padding: var(--space-lg); }
.context-tile__row + .context-tile__row { border-top: 1px solid var(--color-rule); }
.context-tile__label { color: var(--color-muted); margin-bottom: var(--space-xs); }
.context-tile pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-2);
  white-space: pre-wrap;
  word-break: break-word;
}
.context-tile__row--match pre { color: var(--color-ink); }
.context-tile__row--match .context-tile__label { color: var(--color-signal); }

@media (max-width: 56.25rem) {
  .differentiator { grid-template-columns: 1fr; }
}

/* ---------------------------------- Platform teaser ---------------------------------- */

.platform {
  background: var(--color-paper-3);
  border-block: 1px solid var(--color-rule);
  margin-block-end: var(--space-3xl);
}
.platform-inner {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--space-3xl) var(--page-gutter);
  display: grid;
  gap: var(--space-lg);
  max-width: 60ch;
}
.platform h2 { font-size: var(--text-display-s); }
.platform p { color: var(--color-ink-2); font-size: var(--text-md); margin-top: var(--space-sm); }
.platform__roadmap { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); }
.platform__roadmap span {
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.4rem 0.75rem; border: 1px solid var(--color-rule); border-radius: 999px; color: var(--color-ink-2);
}

/* ---------------------------------- Briefing form ---------------------------------- */

.briefing { padding-block-end: var(--space-3xl); }
.briefing-panel {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-2xl);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-lg);
  background: var(--color-paper-2);
  padding: var(--space-2xl);
}
.briefing__pitch h2 { font-size: var(--text-2xl); max-width: 16ch; }
.briefing__pitch p { margin-top: var(--space-md); color: var(--color-ink-2); }
.briefing__pitch ul { list-style: none; margin: var(--space-lg) 0 0; padding: 0; display: grid; gap: var(--space-sm); }
.briefing__pitch li { display: flex; gap: var(--space-sm); font-size: var(--text-sm); color: var(--color-ink-2); }
.briefing__pitch li::before { content: "→"; color: var(--color-accent); flex-shrink: 0; }

.field { display: grid; gap: var(--space-xs); }
.field + .field { margin-top: var(--space-lg); }
.field label { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink); }
.field__helper { font-size: var(--text-xs); color: var(--color-muted); min-height: 1lh; }
.field__helper[data-error="true"] { color: var(--color-error); }

.input, .select {
  height: 44px;
  padding-inline: var(--space-md);
  padding-inline-end: 2.25rem;
  border: 1px solid var(--color-rule-2);
  outline: 2px solid transparent;
  outline-offset: 1px;
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  width: 100%;
  transition: background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out);
}
.input::placeholder { color: var(--color-muted); }
@media (hover: hover) and (pointer: fine) {
  .input:hover, .select:hover { background: var(--color-paper-2); }
}
.input:focus-visible, .select:focus-visible { outline-color: var(--color-focus); border-color: var(--color-ink-2); }
.input[aria-invalid="true"] { border-color: var(--color-error); }
.input[disabled] { opacity: 0.55; cursor: not-allowed; }

.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--color-muted) 50%), linear-gradient(135deg, var(--color-muted) 50%, transparent 50%); background-position: calc(100% - 1.2rem) center, calc(100% - 0.9rem) center; background-size: 6px 6px; background-repeat: no-repeat; }

.briefing__submit { margin-top: var(--space-lg); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-md); }
.briefing__submit .btn { white-space: normal; text-align: center; max-width: 100%; }
.briefing__privacy { font-size: var(--text-xs); color: var(--color-muted); margin-top: var(--space-md); }

@media (max-width: 56.25rem) {
  .briefing-panel { grid-template-columns: 1fr; padding: var(--space-xl); }
}

/* ---------------------------------- Footer (Ft5 Statement) ---------------------------------- */

.foot-stmt {
  padding: var(--space-2xl) var(--page-gutter) var(--space-xl);
  max-width: var(--page-max);
  margin-inline: auto;
  display: grid;
  gap: var(--space-lg);
}
.foot-stmt__line {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 30ch;
  color: var(--color-ink);
}
.foot-stmt__meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-block-start: var(--space-lg);
  border-top: 1px solid var(--color-rule);
  font-size: var(--text-sm);
  color: var(--color-muted);
}
.foot-stmt__links { display: flex; gap: var(--space-lg); }
.foot-stmt__links a { white-space: nowrap; }
@media (hover: hover) and (pointer: fine) {
  .foot-stmt__links a:hover { color: var(--color-ink-2); }
}

/* ---------------------------------- Reveal (page-load + one-shot stagger) ---------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--dur-long) var(--ease-out), transform var(--dur-long) var(--ease-out);
  transition-delay: calc(var(--i, 0) * 60ms);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}