:root {
  --ink: #0f1419;
  --ink-soft: #3a4550;
  --mute: #6b7785;
  --paper: #f4f6f8;
  --paper-elevated: #ffffff;
  --line: #d8dee6;
  --accent: #0d9488;
  --accent-deep: #0f766e;
  --accent-wash: rgba(13, 148, 136, 0.12);
  --glow: rgba(15, 118, 110, 0.18);
  --radius: 14px;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --max: 40rem;
  --wide: 56rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(ellipse 90% 60% at 10% -10%, var(--glow), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 0%, rgba(56, 189, 248, 0.12), transparent 50%),
    linear-gradient(180deg, #eef2f5 0%, var(--paper) 42%, #e8edf2 100%);
  background-attachment: fixed;
}

a {
  color: var(--accent-deep);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(244, 246, 248, 0.82);
  border-bottom: 1px solid var(--line);
}

.site-header__inner,
.site-footer__inner,
.shell {
  width: min(100% - 2rem, var(--wide));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}

.brand span {
  color: var(--accent);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  font-size: 0.95rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 550;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent-deep);
}

main {
  padding: 2.75rem 0 4rem;
}

.hero {
  width: min(100% - 2rem, var(--wide));
  margin: 0 auto 2.5rem;
  animation: rise 0.7s ease-out both;
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 750;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.hero__lead {
  margin: 0;
  max-width: 34rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font-weight: 650;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

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

.btn--primary:hover {
  background: #1c2530;
  color: #fff;
}

.btn--ghost {
  background: var(--paper-elevated);
  border-color: var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.panel {
  width: min(100% - 2rem, var(--wide));
  margin: 0 auto 1.25rem;
  padding: 1.35rem 1.4rem;
  background: var(--paper-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(15, 20, 25, 0.03);
  animation: rise 0.7s ease-out both;
  animation-delay: 0.08s;
}

.panel h2 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.panel p:last-child,
.panel ul:last-child {
  margin-bottom: 0;
}

.panel p,
.panel li {
  color: var(--ink-soft);
}

.grid-2 {
  display: grid;
  gap: 1rem;
  width: min(100% - 2rem, var(--wide));
  margin: 0 auto;
}

@media (min-width: 720px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.grid-2 .panel {
  width: auto;
  margin: 0;
}

.prose {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  animation: rise 0.55s ease-out both;
}

.prose h1 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.4rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.prose .meta {
  margin: 0 0 1.75rem;
  color: var(--mute);
  font-size: 0.92rem;
}

.prose h2 {
  margin: 1.85rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.prose p,
.prose li {
  color: var(--ink-soft);
}

.prose ul {
  padding-left: 1.15rem;
}

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

.faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
  list-style: none;
}

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

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

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

.faq details p {
  margin: 0.65rem 0 0.15rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
  color: var(--mute);
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
}

.site-footer a {
  color: var(--mute);
  text-decoration: none;
}

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

.chip {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-wash);
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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