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

html {
  background: var(--m5k-obsidian);
  color-scheme: dark;
  scroll-behavior: smooth;
}

:root {
  --m5k-rule-subtle: color-mix(in srgb, var(--m5k-platinum) 14%, transparent);
  --m5k-rule-faint: color-mix(in srgb, var(--m5k-platinum) 8%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--m5k-font-primary);
  font-weight: 400;
  background: var(--m5k-obsidian);
  color: var(--m5k-platinum);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--m5k-obsidian) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid color-mix(in srgb, var(--m5k-platinum) 18%, transparent);
  padding-top: max(20px, env(safe-area-inset-top));
  transition: padding 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding-bottom: 20px;
  transition: padding 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.lockup {
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.mark {
  font-size: 28px;
  font-weight: var(--m5k-weight-mark);
  letter-spacing: var(--m5k-tracking-mark);
  line-height: 1;
  transition: font-size 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.descriptor {
  margin-top: 0.85em;
  font-size: 9px;
  font-weight: var(--m5k-weight-descriptor);
  letter-spacing: var(--m5k-tracking-descriptor);
  text-transform: uppercase;
  padding-left: var(--m5k-tracking-descriptor);
  transition:
    margin 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    font-size 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    padding 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav {
  display: flex;
  gap: 8px 28px;
  flex-wrap: wrap;
  padding-top: 8px;
  flex-shrink: 0;
}

.nav a,
.nav button {
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--m5k-platinum);
  opacity: 0.55;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav a:hover,
.nav button:hover {
  opacity: 1;
}

.nav a:focus-visible,
.nav button:focus-visible {
  outline: 1px solid var(--m5k-platinum);
  outline-offset: 4px;
  opacity: 1;
}

/* Hero */
.hero {
  padding: 96px 0 120px;
  background: var(--m5k-obsidian);
}

.hero-title {
  font-family: var(--m5k-font-editorial);
  font-size: clamp(48px, 9vw, 96px);
  font-weight: var(--m5k-weight-editorial);
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.hero-title span {
  display: block;
}

.hero-lede {
  margin-top: 36px;
  max-width: 42ch;
  font-size: 17px;
  opacity: 0.78;
}

.mono-line {
  margin-top: 32px;
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
}

.cta-row {
  margin-top: 40px;
}

.cta-primary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  text-decoration: none;
  color: var(--m5k-champagne);
  border-bottom: 1px solid color-mix(in srgb, var(--m5k-champagne) 45%, transparent);
  padding: 10px 0;
}

.cta-primary:hover {
  border-bottom-color: var(--m5k-champagne);
}

.cta-primary:focus-visible {
  outline: 1px solid var(--m5k-champagne);
  outline-offset: 4px;
}

.hero-meta {
  margin-top: 28px;
  font-size: 14px;
  opacity: 0.55;
}

.hero-meta strong {
  font-weight: 500;
}

/* Sections */
.section {
  padding: 96px 0;
  background: var(--m5k-obsidian);
  border-top: 1px solid var(--m5k-rule-subtle);
}

.surface-obsidian-marble {
  background-color: var(--m5k-obsidian);
  background-image:
    linear-gradient(
      color-mix(in srgb, var(--m5k-obsidian) 96%, transparent),
      color-mix(in srgb, var(--m5k-obsidian) 96%, transparent)
    ),
    var(--m5k-texture-obsidian-marble);
  background-size: cover;
  background-position: center;
  border-top-color: var(--m5k-rule-faint);
}

.surface-obsidian-marble-light {
  background-color: var(--m5k-obsidian);
  background-image:
    linear-gradient(
      color-mix(in srgb, var(--m5k-obsidian) 94%, transparent),
      color-mix(in srgb, var(--m5k-obsidian) 94%, transparent)
    ),
    var(--m5k-texture-obsidian-marble);
  background-size: cover;
  background-position: center 35%;
  border-top-color: var(--m5k-rule-faint);
}

.surface-obsidian-marble .stack-item,
.surface-obsidian-marble-light .stack-item,
.surface-obsidian-marble-light .pillars {
  border-top-color: var(--m5k-rule-faint);
}

.label {
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: 24px;
}

.statement {
  font-family: var(--m5k-font-editorial);
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: var(--m5k-weight-editorial);
  line-height: 1.2;
  letter-spacing: 0.01em;
  max-width: 22ch;
  margin-bottom: 40px;
}

.prose {
  max-width: 52ch;
  font-size: 16px;
  opacity: 0.78;
}

.prose p + p {
  margin-top: 16px;
}

.prose strong {
  font-weight: 500;
  color: var(--m5k-platinum);
  opacity: 1;
}

/* Stack items */
.stack {
  margin-top: 8px;
}

.stack-item {
  padding: 32px 0;
  border-top: 1px solid var(--m5k-rule-subtle);
}

.stack-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.item-title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 10px;
}

.stack-item p {
  max-width: 52ch;
  font-size: 15px;
  opacity: 0.72;
}

.stack-item p + p {
  margin-top: 12px;
}

/* Engagement steps */
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px 32px;
  align-items: start;
}

.step-num {
  font-size: clamp(48px, 6vw, 72px);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--m5k-champagne);
  font-weight: 400;
}

.price {
  margin-top: 16px;
  font-family: var(--m5k-font-technical);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--m5k-champagne);
  opacity: 1;
}

.price strong {
  font-weight: 400;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--m5k-rule-subtle);
}

.pillar {
  font-size: 14px;
  opacity: 0.72;
}

.pillar-title {
  font-size: 15px;
  margin-bottom: 8px;
  opacity: 1;
}

.pillar-title strong {
  font-weight: 500;
}

/* Fit list */
.fit-list {
  margin: 16px 0;
  padding-left: 1.2em;
}

.fit-list li {
  margin-top: 8px;
}

.fit-list li:first-child {
  margin-top: 0;
}

/* Final CTA */
.cta-section {
  padding: 120px 0;
  background: var(--m5k-obsidian);
}

.cta-statement {
  max-width: 18ch;
  margin-bottom: 32px;
}

/* Footer — single warm marble moment */
.site-footer {
  background: var(--m5k-marble);
  color: var(--m5k-obsidian);
  border-top: 1px solid color-mix(in srgb, var(--m5k-platinum) 22%, transparent);
  padding:
    56px 0
    max(48px, env(safe-area-inset-bottom));
}

.footer-inner {
  display: grid;
  gap: 16px;
}

.footer-brand .mark {
  font-size: 24px;
}

.footer-brand .descriptor {
  margin-top: 0.75em;
}

.footer-tagline {
  font-family: var(--m5k-font-editorial);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 400;
  line-height: 1.25;
  margin-top: 8px;
}

.footer-place,
.footer-domain {
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
}

.footer-copy {
  margin-top: 16px;
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.4;
}

.login-dialog {
  border: 1px solid var(--m5k-rule-subtle);
  background: var(--m5k-obsidian);
  color: var(--m5k-platinum);
  padding: 32px 28px;
  width: min(420px, calc(100vw - 32px));
}

.login-dialog::backdrop {
  background: rgba(11, 12, 14, 0.72);
}

.login-title {
  font-family: var(--m5k-font-editorial);
  font-size: 36px;
  font-weight: var(--m5k-weight-editorial);
  line-height: 1.1;
  margin: 12px 0 28px;
}

.login-field {
  display: block;
  margin-top: 18px;
}

.login-field span {
  display: block;
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
}

.login-field input {
  width: 100%;
  margin-top: 6px;
  padding: 10px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--m5k-rule-subtle);
  border-radius: 0;
  color: inherit;
  font: inherit;
  font-size: 16px;
}

.login-field input:focus {
  outline: none;
  border-bottom-color: var(--m5k-champagne);
}

.login-error {
  margin-top: 16px;
  font-size: 14px;
  color: var(--m5k-champagne);
}

.login-actions {
  display: flex;
  justify-content: flex-end;
  gap: 20px;
  margin-top: 28px;
}

.login-cancel,
.login-submit {
  min-height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  color: var(--m5k-platinum);
}

.login-submit {
  color: var(--m5k-champagne);
  border-bottom: 1px solid color-mix(in srgb, var(--m5k-champagne) 45%, transparent);
}

.login-cancel:focus-visible,
.login-submit:focus-visible {
  outline: 1px solid var(--m5k-platinum);
  outline-offset: 4px;
}

.demo {
  padding: 48px 0 96px;
}

.demo-kicker {
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
}

.demo-title {
  margin-top: 16px;
  font-family: var(--m5k-font-editorial);
  font-size: clamp(40px, 7vw, 72px);
  font-weight: var(--m5k-weight-editorial);
  line-height: 1.05;
}

.role-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 36px;
}

.role-row button {
  min-height: 44px;
  padding: 8px 0;
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  color: var(--m5k-platinum);
  opacity: 0.55;
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}

.role-row button[aria-pressed="true"] {
  opacity: 1;
  border-bottom-color: var(--m5k-champagne);
  color: var(--m5k-champagne);
}

.role-row button:focus-visible {
  outline: 1px solid var(--m5k-platinum);
  outline-offset: 4px;
}

.role-brief {
  margin-top: 28px;
  max-width: 52ch;
  font-size: 16px;
  opacity: 0.78;
}

.role-meta {
  margin-top: 10px;
  font-family: var(--m5k-font-technical);
  font-size: 10px;
  letter-spacing: var(--m5k-tracking-label);
  text-transform: uppercase;
  opacity: 0.55;
}

.match-list {
  margin-top: 36px;
}

.match {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px 24px;
  padding: 24px 0;
  border-top: 1px solid var(--m5k-rule-subtle);
}

.match-score {
  font-family: var(--m5k-font-technical);
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--m5k-champagne);
}

.match h2 {
  font-size: 16px;
  font-weight: 500;
}

.match p {
  margin-top: 6px;
  max-width: 62ch;
  font-size: 15px;
  opacity: 0.72;
}

.demo-status {
  margin-top: 32px;
  max-width: 52ch;
  opacity: 0.72;
}

/* Mobile */
@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    transition:
      flex-direction 0s,
      align-items 0.25s cubic-bezier(0.16, 1, 0.3, 1),
      gap 0.25s cubic-bezier(0.16, 1, 0.3, 1),
      padding 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav {
    padding-top: 0;
    width: 100%;
  }

  .site-header.is-compact {
    padding-top: max(10px, env(safe-area-inset-top));
  }

  .site-header.is-compact .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
  }

  .site-header.is-compact .lockup {
    display: flex;
    align-items: baseline;
    gap: 0.55em;
    min-width: 0;
    flex-shrink: 1;
  }

  .site-header.is-compact .mark {
    font-size: 18px;
  }

  .site-header.is-compact .descriptor {
    margin-top: 0;
    font-size: 7px;
    letter-spacing: 0.22em;
    padding-left: 0;
    white-space: nowrap;
  }

  .site-header.is-compact .nav {
    width: auto;
    gap: 6px 14px;
    flex-wrap: nowrap;
  }

  .site-header.is-compact .nav a,
  .site-header.is-compact .nav button {
    min-height: 36px;
    font-size: 9px;
    letter-spacing: 0.16em;
    padding: 2px 0;
  }

  .hero {
    padding: 64px 0 80px;
  }

  .section {
    padding: 72px 0;
  }

  .step {
    grid-template-columns: 56px 1fr;
    gap: 16px 20px;
  }

  .pillars {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 40px;
  }

  .cta-section {
    padding: 80px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header {
    backdrop-filter: none;
  }

  .site-header,
  .header-inner,
  .mark,
  .descriptor {
    transition: none;
  }
}