:root {
  --bg: #eaf1ff;
  --panel: #f9fbff;
  --ink: #0c1324;
  --muted: #3f4c6a;
  --line: #1c2943;
  --accent: #2459e0;
  --accent-2: #e85d2b;
  --soft: #dbe7ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Bricolage Grotesque", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, #d6f0ff 0%, transparent 28%),
    radial-gradient(circle at 92% 8%, #e6dcff 0%, transparent 24%),
    linear-gradient(180deg, #eaf1ff 0%, #dfe8fb 100%);
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  border: 2px solid var(--line);
  border-radius: 0.95rem;
  background: rgba(248, 251, 255, 0.9);
  backdrop-filter: blur(6px);
  padding: 0.9rem 1rem;
  box-shadow: 4px 4px 0 var(--line);
}

.logo {
  margin-right: auto;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: var(--soft);
  padding: 0.3rem 0.5rem;
}

.nav-link {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  border-radius: 0.45rem;
  padding: 0.2rem 0.35rem;
}

.nav-link.active {
  background: var(--soft);
}

main {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.panel {
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: 4px 4px 0 var(--line);
}

.hero {
  padding: 1.2rem;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.3rem);
  max-width: 22ch;
}

.kicker {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  background: var(--soft);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--accent);
}

.grid {
  display: grid;
  gap: 0.8rem;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.full-width {
  grid-column: 1 / -1;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.button,
button {
  border: 2px solid var(--line);
  border-radius: 0.75rem;
  padding: 0.65rem 0.95rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(130deg, var(--accent), #4981ff);
  box-shadow: 2px 2px 0 var(--line);
}

.button.ghost {
  color: var(--ink);
  background: #fff;
}

.text-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

label {
  font-weight: 600;
  display: block;
  margin-top: 0.35rem;
}

.inline-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

input,
select,
textarea {
  width: 100%;
  font: inherit;
  border: 2px solid var(--line);
  border-radius: 0.6rem;
  padding: 0.58rem;
  background: #fff;
}

.checklist {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.7rem;
}

.checklist label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

.output {
  margin: 0.7rem 0 0;
  border: 2px solid var(--line);
  border-radius: 0.7rem;
  padding: 0.8rem;
  background: #f4f8ff;
  min-height: 110px;
  white-space: pre-wrap;
  font-family: "JetBrains Mono", monospace;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  border: 2px solid var(--line);
  text-align: left;
  padding: 0.6rem;
}

th {
  background: #e7efff;
}

.list {
  margin: 0 0 0.8rem;
  padding-left: 1.1rem;
}

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

.footer {
  margin-top: 1rem;
  text-align: center;
  color: var(--muted);
  font-weight: 600;
}

.top-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.top-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 960px) {
  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    position: static;
  }

  h1 {
    max-width: none;
  }
}