:root {
  --bg: #f8f5f1;
  --panel: #ffffff;
  --panel-strong: #f1ece7;
  --line: #d6cec8;
  --text: #202020;
  --muted: #625c57;
  --quiet: #7a736d;
  --header-bg: rgba(248, 245, 241, 0.94);
  --header-line: rgba(32, 32, 32, 0.11);
  --hero-lede: #3e3935;
  --logo-opacity: 0.08;
  --board-bg: rgba(255, 255, 255, 0.9);
  --board-dark: #ffffff;
  --band-bg: #ffffff;
  --band-text: #202020;
  --card-bg: #fdfcfa;
  --card-border: #d3cbc5;
  --card-text: #59524e;
  --footer-line: rgba(32, 32, 32, 0.11);
  --coral: #ef795f;
  --coral-dark: #9f241f;
  --teal: #51b7b0;
  --green: #2f8d4b;
  --blue: #0b5589;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #181818;
    --panel: #222222;
    --panel-strong: #2b2b2b;
    --line: #414141;
    --text: #f3f0ed;
    --muted: #b9b3ae;
    --quiet: #8c8782;
    --header-bg: rgba(24, 24, 24, 0.94);
    --header-line: rgba(255, 255, 255, 0.08);
    --hero-lede: #ded9d5;
    --logo-opacity: 0.08;
    --board-bg: rgba(34, 34, 34, 0.92);
    --board-dark: #1d1d1d;
    --band-bg: #f3f0ed;
    --band-text: #202020;
    --card-bg: #ffffff;
    --card-border: #d3cbc5;
    --card-text: #59524e;
    --footer-line: rgba(255, 255, 255, 0.08);
  }
}

:root[data-theme="dark"] {
  --bg: #181818;
  --panel: #222222;
  --panel-strong: #2b2b2b;
  --line: #414141;
  --text: #f3f0ed;
  --muted: #b9b3ae;
  --quiet: #8c8782;
  --header-bg: rgba(24, 24, 24, 0.94);
  --header-line: rgba(255, 255, 255, 0.08);
  --hero-lede: #ded9d5;
  --logo-opacity: 0.08;
  --board-bg: rgba(34, 34, 34, 0.92);
  --board-dark: #1d1d1d;
  --band-bg: #f3f0ed;
  --band-text: #202020;
  --card-bg: #ffffff;
  --card-border: #d3cbc5;
  --card-text: #59524e;
  --footer-line: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--header-line);
  background: var(--header-bg);
  backdrop-filter: blur(16px);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.brand-link img {
  width: clamp(220px, 27vw, 360px);
  height: auto;
  display: block;
}

.logo-dark {
  display: none;
}

:root[data-theme="light"] .logo-light {
  display: block;
}

:root[data-theme="light"] .logo-dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .logo-light {
    display: none;
  }

  :root:not([data-theme]) .logo-dark {
    display: block;
  }
}

:root[data-theme="dark"] .logo-light {
  display: none;
}

:root[data-theme="dark"] .logo-dark {
  display: block;
}

nav {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.nav-link,
.theme-toggle,
.login-link,
.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.94rem;
}

.nav-link {
  color: var(--muted);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.theme-toggle {
  border: 1px solid var(--line);
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--teal);
}

.theme-toggle::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-right: 8px;
  border-radius: 999px;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(81, 183, 176, 0.16);
}

.login-link,
.primary-action {
  background: var(--coral-dark);
  color: #fff7f4;
  box-shadow: 0 10px 30px rgba(159, 36, 31, 0.22);
}

.login-link:hover,
.primary-action:hover {
  background: #b62b25;
}

.secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.secondary-action:hover {
  border-color: rgba(81, 183, 176, 0.65);
  background: rgba(81, 183, 176, 0.12);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(88svh - 76px);
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("assets/cassiassist-lockup-dark.png");
  background-repeat: no-repeat;
  background-position: right 5vw top 10vh;
  background-size: min(820px, 70vw) auto;
  opacity: var(--logo-opacity);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: linear-gradient(90deg, var(--coral), var(--teal), var(--green), var(--blue));
}

.hero-inner {
  position: relative;
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding: 64px 0 84px;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 0.78rem;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(3.7rem, 7vw, 6.2rem);
  line-height: 0.88;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 650px;
  margin-bottom: 30px;
  color: var(--hero-lede);
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  line-height: 1.22;
  font-weight: 650;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.signal-board {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--board-bg);
  box-shadow: var(--shadow);
  padding: 18px;
}

.signal-header,
.metric-row,
.source-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.signal-header {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-weight: 800;
}

.signal-header strong,
.source-strip span {
  border-radius: 999px;
  background: rgba(47, 141, 75, 0.2);
  color: #bff2cc;
  padding: 5px 10px;
  font-size: 0.76rem;
  text-transform: uppercase;
}

.metric-row {
  margin: 18px 0;
}

.metric-row div {
  flex: 1;
  min-height: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  padding: 18px;
}

.metric-row span,
.recommendation span {
  display: block;
  color: var(--quiet);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.metric-row strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.3rem, 3vw, 2rem);
}

.recommendation {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--board-dark);
  padding: 18px;
}

.recommendation strong {
  display: block;
  margin: 8px 0;
  color: var(--text);
  font-size: 1.18rem;
  line-height: 1.26;
}

.recommendation p {
  margin-bottom: 0;
  color: var(--muted);
}

.source-strip {
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-top: 18px;
}

.source-strip span {
  background: color-mix(in srgb, var(--panel-strong) 72%, #0f1415);
  color: var(--text);
}

.section {
  padding: clamp(56px, 8vw, 96px) clamp(20px, 4vw, 56px);
}

.band {
  background: var(--band-bg);
  color: var(--band-text);
}

.section-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-grid article {
  min-height: 220px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card-bg);
  padding: 22px;
}

.feature-grid h3 {
  margin-bottom: 12px;
  color: var(--band-text);
  font-size: 1.1rem;
}

.feature-grid p {
  margin-bottom: 0;
  color: var(--card-text);
}

.partner-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: clamp(24px, 5vw, 42px);
}

.partner-panel div {
  max-width: 760px;
}

.partner-panel p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.legal-page {
  padding: clamp(44px, 7vw, 82px) clamp(18px, 4vw, 56px);
}

.legal-document {
  width: min(920px, 100%);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
  padding: clamp(24px, 5vw, 52px);
}

.legal-document h1 {
  margin-bottom: 14px;
  font-size: clamp(2.7rem, 7vw, 5.2rem);
}

.legal-document h2 {
  margin: 36px 0 12px;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.12;
}

.legal-document p,
.legal-document li {
  color: var(--muted);
  font-size: 1.02rem;
}

.legal-document p {
  margin-bottom: 16px;
}

.legal-document ul {
  margin: 0 0 18px;
  padding-left: 22px;
}

.legal-document li + li {
  margin-top: 8px;
}

.legal-document a {
  color: var(--teal);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.legal-updated {
  color: var(--quiet);
  font-weight: 800;
}

.compact {
  flex: 0 0 auto;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 86px;
  padding: 20px clamp(18px, 4vw, 56px);
  border-top: 1px solid var(--footer-line);
  color: var(--muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--text);
  font-weight: 750;
}

.site-footer a:hover {
  color: var(--teal);
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  nav {
    width: 100%;
    flex-wrap: wrap;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner,
  .split {
    grid-template-columns: 1fr;
  }

  .signal-board {
    max-width: 620px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid article {
    min-height: 0;
  }
}

@media (max-width: 560px) {
  .brand-link img {
    width: min(240px, 72vw);
  }

  nav {
    gap: 8px;
  }

  .nav-link,
  .theme-toggle,
  .login-link,
  .primary-action,
  .secondary-action {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.86rem;
  }

  .hero-inner {
    width: min(100% - 28px, 1200px);
    padding: 44px 0 58px;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 3.9rem);
  }

  .hero-lede {
    font-size: 1.24rem;
  }

  .signal-board {
    display: none;
  }

  .metric-row {
    flex-direction: column;
  }

  .metric-row div {
    width: 100%;
    min-height: 84px;
  }

  .partner-panel,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .legal-document {
    padding: 22px;
  }
}