:root {
  color-scheme: dark;
  --bg: #06101d;
  --panel: rgba(12, 27, 47, 0.88);
  --line: rgba(148, 163, 184, 0.16);
  --text: #e7eefc;
  --muted: #8fa3bf;
  --mint: #2dd4bf;
  --violet: #818cf8;
  --danger: #fb7185;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

body {
  padding: 24px 16px calc(30px + env(safe-area-inset-bottom));
  overflow-x: hidden;
}

.glow {
  position: fixed;
  inset: -22% -35% auto;
  height: 55vh;
  background:
    radial-gradient(circle at 30% 28%, rgba(45, 212, 191, 0.18), transparent 56%),
    radial-gradient(circle at 78% 22%, rgba(129, 140, 248, 0.16), transparent 52%);
  pointer-events: none;
  filter: blur(12px);
}

[hidden] {
  display: none !important;
}

.shell {
  position: relative;
  width: min(620px, 100%);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 42px;
}

.logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--mint), var(--violet));
  color: #04101c;
  font: 850 12px/1 var(--font);
}

.brand > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand strong {
  font-size: 13px;
  letter-spacing: 0.02em;
}

.brand span:not(.logo) {
  color: var(--muted);
  font: 8.5px/1 var(--mono);
  letter-spacing: 0.1em;
}

.hero {
  margin-bottom: 18px;
}

.eyebrow {
  color: var(--mint);
  font: 700 9px/1 var(--mono);
  letter-spacing: 0.18em;
}

.hero h1 {
  margin: 10px 0 10px;
  font-size: clamp(30px, 8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.redeem-panel {
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.field-label {
  display: block;
  margin-bottom: 7px;
  color: #b9c7dd;
  font-size: 10px;
  font-weight: 600;
}

.key-input {
  width: 100%;
  height: 54px;
  padding: 0 14px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  background: rgba(4, 13, 25, 0.6);
  color: #f1f6ff;
  font: 650 18px/1 var(--mono);
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
  outline: none;
}

.key-input::placeholder {
  color: #52657e;
  letter-spacing: 0.08em;
}

.key-input:focus {
  border-color: rgba(45, 212, 191, 0.55);
  box-shadow: 0 0 0 4px rgba(45, 212, 191, 0.08);
}

.primary {
  width: 100%;
  height: 46px;
  margin-top: 11px;
  border: 0;
  border-radius: 11px;
  background: linear-gradient(135deg, #2dd4bf, #5eead4);
  color: #04121d;
  font: 700 12px/1 var(--font);
  cursor: pointer;
}

.primary:disabled {
  opacity: 0.55;
  cursor: wait;
}

.error {
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid rgba(251, 113, 133, 0.26);
  border-radius: 10px;
  background: rgba(251, 113, 133, 0.07);
  color: #fecdd3;
  font-size: 11px;
  line-height: 1.7;
}

.result {
  margin-top: 18px;
  padding: 19px;
  border: 1px solid rgba(45, 212, 191, 0.22);
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(12, 34, 43, 0.96), rgba(8, 23, 38, 0.96));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.24);
}

.result-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}

.result-badge {
  flex: none;
  padding: 4px 7px;
  border-radius: 999px;
  background: rgba(45, 212, 191, 0.1);
  color: var(--mint);
  font: 700 8.5px/1 var(--mono);
  letter-spacing: 0.08em;
}

.result h2 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.result-content {
  padding: 13px 14px;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 11px;
  background: rgba(4, 13, 25, 0.4);
  color: #d9e6f7;
  font-size: 12.5px;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.result-content:empty {
  display: none;
}

.result-links {
  display: grid;
  gap: 7px;
  margin-top: 10px;
}

.result-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid rgba(129, 140, 248, 0.2);
  border-radius: 10px;
  background: rgba(129, 140, 248, 0.06);
  color: #c7d2fe;
  font-size: 11.5px;
  font-weight: 600;
  text-decoration: none;
}

.result-links a::after {
  content: '↗';
  color: var(--mint);
}

.result-links a:hover {
  border-color: rgba(45, 212, 191, 0.35);
}

.result-usage {
  margin-top: 12px;
  color: #6f829d;
  font: 9.5px/1.6 var(--mono);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 26px 2px 0;
  color: #52657e;
  font: 8.5px/1.5 var(--mono);
}

@media (max-width: 420px) {
  body {
    padding-top: 18px;
  }

  .brand {
    margin-bottom: 30px;
  }

  .footer {
    flex-direction: column;
    gap: 5px;
  }
}