:root {
  --bg: #f4f5f4;
  --surface: #ffffff;
  --surface-alt: #eef0ea;
  --ink: #1f2a2c;
  --muted: #546163;
  --line: #d2d7d1;
  --accent: #0f7666;
  --accent-2: #f0b429;
  --accent-3: #254f88;
  --shadow: 0 16px 45px rgba(13, 48, 45, 0.14);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Manrope', 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
.brand {
  font-family: 'Space Grotesk', 'Manrope', sans-serif;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

p {
  margin: 0;
}

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

main {
  display: grid;
  gap: 2.6rem;
  padding-bottom: 5rem;
}

.shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
}

.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.blob {
  position: absolute;
  filter: blur(48px);
  border-radius: 999px;
  opacity: 0.55;
  animation: drift 18s ease-in-out infinite;
  will-change: transform;
}

.blob-a {
  background: linear-gradient(120deg, #5bc0ae, #1d7f71);
  width: 420px;
  height: 420px;
  top: -120px;
  left: -70px;
}

.blob-b {
  background: linear-gradient(120deg, #f7c24f, #f08a4b);
  width: 340px;
  height: 340px;
  right: -90px;
  top: 220px;
  animation-delay: -4s;
}

.blob-c {
  background: linear-gradient(120deg, #6999d2, #3f658f);
  width: 360px;
  height: 360px;
  bottom: -170px;
  left: 40%;
  animation-delay: -8s;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(20, 33, 36, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 33, 36, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 95%);
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(18px, -20px, 0) scale(1.08);
  }
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 10;
  margin-top: 1rem;
  transition: transform 0.28s ease, opacity 0.28s ease, box-shadow 0.28s ease;
  will-change: transform;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  box-shadow: var(--shadow);
  padding: 0.8rem 1rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
}

.site-header.is-hidden {
  transform: translateY(calc(-100% - 22px));
  opacity: 0.2;
  box-shadow: none;
}

.site-header nav {
  display: flex;
  justify-content: center;
  gap: 1.1rem;
  font-weight: 600;
  color: var(--muted);
}

.site-header nav a:hover {
  color: var(--ink);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  display: block;
  height: clamp(3.6rem, 8vw, 5.4rem);
  width: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), #1f9f8d);
  color: white;
  font-weight: 700;
  padding: 0.78rem 1.15rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 10px 25px rgba(20, 91, 84, 0.3);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.58rem 0.95rem;
  font-size: 0.92rem;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  border-color: var(--line);
  box-shadow: none;
}

.hero {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  background: #e8efe6;
  color: #225547;
  border: 1px solid #bdd6ca;
  border-radius: 999px;
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.62rem;
  margin-bottom: 0.85rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 4.2rem);
  margin-bottom: 0.9rem;
  text-wrap: balance;
}

.lead {
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.3rem;
}

.hero-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.93), rgba(255, 255, 255, 0.84));
  border: 1px solid rgba(255, 255, 255, 1);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 0.9rem;
  font-size: 0.92rem;
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot::before {
  content: '';
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 999px;
  background: #29b07d;
  box-shadow: 0 0 0 8px rgba(41, 176, 125, 0.14);
}

.chat-row {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.from-user,
.from-ai {
  padding: 0.8rem 0.85rem;
  border-radius: 14px;
  font-weight: 600;
}

.from-user {
  background: #dce9ff;
}

.from-ai {
  background: #d9f0eb;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.stats-grid div {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.68rem;
}

.stats-grid strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.48rem;
}

.stats-grid span {
  color: var(--muted);
  font-size: 0.82rem;
}

.value,
.how,
.support,
.cta,
.legal-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

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

.value article {
  background: linear-gradient(160deg, var(--surface), var(--surface-alt));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.value h3 {
  margin-bottom: 0.5rem;
}

.value p,
.support p,
.cta p,
.legal-card p {
  color: var(--muted);
}

.section-title {
  margin-bottom: 1rem;
}

.section-title h2,
.support h2,
.cta h2,
.legal-card h1 {
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.steps article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.steps span {
  color: var(--accent);
  font-weight: 800;
}

.steps h4 {
  margin: 0.4rem 0;
  font-size: 1.06rem;
}

.support {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  align-items: start;
}

.support ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.45rem;
  font-weight: 600;
}

.cta {
  text-align: center;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
}

.site-footer {
  margin: 0 auto 2rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer div {
  display: flex;
  gap: 1rem;
}

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

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.legal-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.legal-card {
  max-width: 760px;
  width: min(760px, calc(100% - 2rem));
  display: grid;
  gap: 1rem;
}

.back-link {
  color: var(--accent-3);
  font-weight: 700;
}

@media (max-width: 920px) {
  .site-header {
    border-radius: 20px;
    grid-template-columns: 1fr;
    text-align: center;
  }

  
.site-header nav {
    justify-content: center;
    flex-wrap: wrap;
  }

  .brand-logo {
    height: 3.2rem;
  }

  .hero,
  .support,
  .steps,
  .value {
    grid-template-columns: 1fr;
  }

  .hero {
    margin-top: 2rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .site-header {
    transition: none !important;
  }
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translate(-50%, 24px);
  background: #1f2a2c;
  color: #f4f5f4;
  border-radius: 999px;
  padding: 0.66rem 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
  z-index: 40;
}

.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 640px) {
  body {
    font-size: 1.08rem;
    line-height: 1.62;
  }

  p,
  li {
    font-size: 1.03rem;
  }

  h2,
  h3,
  h4 {
    line-height: 1.2;
  }

  .section-title h2,
  .support h2,
  .cta h2,
  .legal-card h1 {
    font-size: clamp(1.65rem, 7vw, 2.2rem);
  }

  .value h3 {
    font-size: 1.28rem;
  }

  .steps h4 {
    font-size: 1.16rem;
  }

  .site-header nav a {
    font-size: 0.95rem;
    font-weight: 700;
  }

  main {
    gap: 1.35rem;
    padding-bottom: 3.2rem;
  }

  .shell {
    width: min(1100px, calc(100% - 1rem));
  }

  .site-header {
    position: sticky;
    top: 8px;
    margin-top: 0.5rem;
    padding: 0.72rem 0.7rem 0.85rem;
    gap: 0.65rem;
  }

  
.site-header nav {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.45rem;
    font-size: 0.86rem;
  }

  .site-header nav a {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.48rem 0.4rem;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .site-header .btn-sm {
    width: 100%;
    min-height: 44px;
  }

  .brand-logo {
    height: 2.95rem;
  }

  .hero {
    margin-top: 0.9rem;
    gap: 1rem;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 9vw, 2.5rem);
    line-height: 1.06;
  }

  .lead {
    font-size: 1rem;
    line-height: 1.45;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 46px;
  }

  .hero-panel,
  .value,
  .how,
  .support,
  .cta,
  .legal-card {
    padding: 1rem;
  }

  .panel-head {
    font-size: 0.84rem;
  }

  .stats-grid strong {
    font-size: 1.34rem;
  }

  .steps article,
  .value article {
    padding: 0.85rem;
  }

  .support ul {
    padding-left: 1rem;
  }

  .site-footer {
    margin: 0 auto 1.2rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .site-footer div {
    flex-wrap: wrap;
    gap: 0.7rem;
  }

  .blob-a,
  .blob-b,
  .blob-c {
    filter: blur(54px);
    opacity: 0.42;
  }

  .toast {
    width: calc(100% - 1rem);
    text-align: center;
  }
}

@media (max-width: 420px) {
  
.site-header nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-logo {
    height: 2.7rem;
  }

  .hero h1 {
    font-size: clamp(1.65rem, 10vw, 2.2rem);
  }

  .eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.04em;
  }

  .btn,
  .btn-sm {
    font-size: 0.99rem;
  }

  p,
  li {
    font-size: 1.01rem;
  }
}

.how-guide-link {
  margin-top: 0.95rem;
  background: linear-gradient(155deg, #f9fbf7, #edf4f1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: grid;
  gap: 0.58rem;
}

.how-guide-link h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
}

.how-guide-link p {
  color: var(--muted);
}

.how-guide-link .btn {
  justify-self: start;
}

@media (max-width: 640px) {
  .how-guide-link .btn {
    width: 100%;
    min-height: 44px;
  }
}