:root {
  --bg: #e8eef4;
  --bg-deep: #d5dde8;
  --ink: #121820;
  --muted: #4a5868;
  --panel: rgba(255, 255, 255, 0.72);
  --line: rgba(18, 24, 32, 0.12);
  --accent: #0d8f82;
  --accent-ink: #043532;
  --danger: #b42318;
  --display: "Syne", "Avenir Next", sans-serif;
  --body: "Source Sans 3", "Segoe UI", sans-serif;
  --shadow: 0 24px 60px rgba(18, 24, 32, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.05rem;
  line-height: 1.5;
  background:
    radial-gradient(90% 60% at 80% -10%, #b8d4e8 0%, transparent 55%),
    radial-gradient(70% 50% at 10% 20%, #c5ebe4 0%, transparent 45%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(232, 238, 244, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.85rem 1.25rem;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
}

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

.nav-cta {
  color: var(--accent-ink) !important;
  background: var(--accent);
  padding: 0.45rem 0.9rem;
  border-radius: 10px;
}

.hero {
  position: relative;
  min-height: min(100vh, 920px);
  min-height: min(100dvh, 920px);
  display: grid;
  align-content: end;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
  overflow: hidden;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  animation: hero-in 1.1s ease-out both;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(18, 24, 32, 0.15) 0%, rgba(18, 24, 32, 0.55) 55%, rgba(18, 24, 32, 0.82) 100%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 36rem;
  color: #f4f7fa;
  animation: rise 0.85s ease-out 0.15s both;
}

.brand-mark {
  margin: 0 0 0.5rem;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.25rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
}

.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 18ch;
}

.lede {
  margin: 0.85rem 0 0;
  font-size: 1.12rem;
  line-height: 1.45;
  color: rgba(244, 247, 250, 0.88);
  max-width: 34ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
  animation: rise 0.85s ease-out 0.35s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--body);
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn.primary:hover {
  filter: brightness(1.05);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #f4f7fa;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.band.safety {
  margin: 0;
  padding: 1rem clamp(1rem, 4vw, 2.5rem);
  background: #121820;
  color: #d7dee6;
}

.band.safety p {
  margin: 0 auto;
  max-width: 52rem;
  font-size: 1rem;
}

.band.safety strong {
  color: #fff;
}

.section {
  padding: clamp(3rem, 8vw, 5rem) clamp(1rem, 4vw, 2.5rem);
  max-width: 56rem;
  margin: 0 auto;
}

.section h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.02em;
}

.section-lede {
  margin: 0.75rem 0 0;
  color: var(--muted);
  max-width: 40rem;
  font-size: 1.15rem;
}

.use-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.use-list li {
  display: grid;
  gap: 0.35rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.use-list strong {
  font-family: var(--display);
  font-size: 1.25rem;
}

.use-list span {
  color: var(--muted);
}

.how {
  max-width: none;
  background: rgba(255, 255, 255, 0.45);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.how h2,
.how .how-steps,
.how .how-note {
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.how-steps {
  list-style: none;
  margin: 2rem auto 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.how-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.step-n {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
  min-width: 1.5rem;
}

.how-steps p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.how-note {
  margin-top: 1.75rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.faq-list {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.65rem;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 0.35rem 0 0.85rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1.1rem;
  list-style: none;
  padding: 0.5rem 0;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 700;
}

.faq-list details[open] summary::after {
  content: "–";
}

.faq-list p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  max-width: 44rem;
}

.more-faq {
  margin: 1.5rem 0 0;
  font-weight: 700;
}

.cta-band {
  text-align: center;
  padding-bottom: 4rem;
}

.cta-band p {
  color: var(--muted);
  margin: 0.65rem 0 1.25rem;
}

.foot {
  padding: 2rem clamp(1rem, 4vw, 2.5rem) 2.5rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.35);
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.foot-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.foot-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Auth pages share this stylesheet */
.auth-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.auth-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem 3rem;
}

.auth-panel {
  width: min(420px, 100%);
  padding: 1.75rem 1.5rem 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  animation: rise 0.55s ease-out both;
}

.auth-panel h1 {
  margin: 0;
  font-family: var(--display);
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.auth-panel .sub {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.auth-form {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.auth-form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.auth-form input {
  min-height: 3rem;
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.auth-form input:focus {
  outline: 2px solid rgba(13, 143, 130, 0.35);
  border-color: var(--accent);
}

.auth-form .btn {
  width: 100%;
  margin-top: 0.25rem;
  border: 0;
}

.auth-status {
  min-height: 1.25rem;
  margin: 0.75rem 0 0;
  color: var(--danger);
  font-size: 0.95rem;
}

.auth-status.ok {
  color: var(--accent);
}

.auth-links {
  margin: 1.25rem 0 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-weight: 600;
}

.faq-page .section {
  padding-top: 2rem;
}

.faq-page .page-title {
  max-width: 56rem;
  margin: 0 auto;
  padding: 2.5rem clamp(1rem, 4vw, 2.5rem) 0;
}

.faq-page .page-title h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 2.8rem);
  letter-spacing: -0.02em;
}

.faq-page .page-title p {
  margin: 0.65rem 0 0;
  color: var(--muted);
  max-width: 40rem;
}

@keyframes hero-in {
  from {
    transform: scale(1.06);
    opacity: 0.65;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .top-nav a:not(.nav-cta) {
    display: none;
  }

  .hero {
    min-height: 85vh;
    align-content: end;
  }

  .brand-mark {
    font-size: clamp(2rem, 10vw, 3rem);
  }
}