:root {
  --bg: #020617;
  --card-bg: #020617;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.1);
  --danger: #f97373;
  --danger-soft: rgba(248, 113, 113, 0.1);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #020617 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

/* Layout */

header {
  max-width: 960px;
  margin: 1.5rem auto 1rem;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card {
  max-width: 960px;
  margin: 0 auto 1rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

/* Typography */

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--accent);
  background: rgba(15, 23, 42, 1);
}

.btn-primary {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.btn-primary:hover {
  background: rgba(56, 189, 248, 0.2);
}

.btn-danger {
  border-color: var(--danger);
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.2);
}

/* Danger links */

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

.danger:hover {
  color: #fecaca;
}

/* Forms */

label {
  display: block;
  margin-bottom: 0.75rem;
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: #020617;
  color: var(--text);
  margin-top: 0.25rem;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.7);
}

/* Tags */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.8);
  font-size: 0.75rem;
}

/* Pre */

pre {
  background: #020617;
  border-radius: 0.5rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  overflow-x: auto;
  font-size: 0.8rem;
}

/* Small screens */

@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}