:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #6366f1;
  --ok: #22c55e;
  --bad: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.card {
  background: var(--card);
  padding: 2.5rem;
  border-radius: 16px;
  width: min(420px, 90vw);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.check-form {
  display: flex;
  gap: 0.5rem;
}

input {
  flex: 1;
  padding: 0.7rem 0.9rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #0f172a;
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  padding: 0.7rem 1.2rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.1);
}

.result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 8px;
  background: #0f172a;
  border-left: 4px solid var(--muted);
}

.result.ok {
  border-left-color: var(--ok);
}

.result.bad {
  border-left-color: var(--bad);
}

.result .status {
  font-weight: 600;
  font-size: 1.1rem;
}

.result .detail {
  color: var(--muted);
  margin-top: 0.4rem;
  font-size: 0.9rem;
}

/* Subscribe page */
.key {
  background: #0f172a;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  font-size: 0.85rem;
  word-break: break-all;
}

.plans {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.plan {
  position: relative;
  flex: 1;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.plan-best {
  border-color: var(--accent);
}

.badge {
  position: absolute;
  top: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-name {
  color: var(--muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.plan-price {
  font-size: 1.8rem;
  font-weight: 700;
}

.plan-price .per {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--muted);
}

.plan button {
  width: 100%;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.fineprint {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}