:root {
  color-scheme: dark;
  --bg: #08111f;
  --card: #101d33;
  --card-2: #14243f;
  --text: #eef5ff;
  --muted: #9bb0ce;
  --accent: #57d6a3;
  --accent-2: #77a7ff;
  --danger: #ff8b8b;
  --line: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(87, 214, 163, 0.16), transparent 34rem),
    radial-gradient(circle at top right, rgba(119, 167, 255, 0.15), transparent 34rem),
    var(--bg);
  color: var(--text);
  font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025)), var(--card);
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.24);
  padding: 24px;
}

.hero {
  min-height: 320px;
  display: grid;
  align-content: center;
  margin-bottom: 16px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

h2 {
  letter-spacing: -0.03em;
}

.lede {
  max-width: 780px;
  color: var(--muted);
  font-size: 1.2rem;
}

.hero-actions,
.packet-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.hero-actions {
  justify-content: flex-start;
}

button,
.hero-actions a {
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #06120f;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  font-weight: 800;
  text-decoration: none;
}

.hero-actions a,
#copy-packet {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  border: 1px solid var(--line);
}

.warning {
  border-color: rgba(255, 139, 139, 0.5);
  background: rgba(255, 139, 139, 0.08);
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 16px;
  margin-bottom: 16px;
}

.stack {
  display: grid;
  gap: 14px;
}

label {
  color: var(--muted);
  display: grid;
  gap: 6px;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}

textarea {
  resize: vertical;
}

.checks {
  display: grid;
  gap: 8px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
}

.checks label {
  display: flex;
  align-items: center;
  color: var(--text);
}

.checks input {
  width: auto;
}

.score {
  border-radius: 18px;
  padding: 18px;
  background: var(--card-2);
  border: 1px solid var(--line);
}

ol {
  padding-left: 1.3rem;
}

li + li {
  margin-top: 12px;
}

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

.ok,
.danger {
  border-radius: 16px;
  padding: 12px;
  font-weight: 800;
}

.ok {
  color: #0a1914;
  background: var(--accent);
}

.danger {
  color: #220707;
  background: var(--danger);
}

pre {
  white-space: pre-wrap;
  overflow: auto;
  max-height: 760px;
  margin: 0;
  padding: 18px;
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--line);
  color: #e8f0ff;
}

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

.split-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.split-list ul {
  margin: 0;
  padding-left: 1.2rem;
}

.unlock-ready {
  border-color: rgba(87, 214, 163, 0.55);
  background: rgba(87, 214, 163, 0.12);
}

.unlock-blocked {
  border-color: rgba(255, 139, 139, 0.55);
  background: rgba(255, 139, 139, 0.1);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.validation-list {
  display: grid;
  gap: 10px;
}

.validation {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.04);
}

.validation.pass {
  border-color: rgba(87, 214, 163, 0.45);
}

.validation.fail {
  border-color: rgba(255, 139, 139, 0.55);
}

.validation.pass strong {
  color: var(--accent);
}

.validation.fail strong {
  color: var(--danger);
}

@media (max-width: 820px) {
  .grid,
  .footer-grid,
  .split-list {
    grid-template-columns: 1fr;
  }
}