:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2563c7;
  --danger: #f87171;
  --ok: #4ade80;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.95rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

h1 {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  font-weight: 600;
}

h2 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  max-width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

textarea {
  min-height: 4rem;
  resize: vertical;
}

.row {
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: none;
  font-size: 0.95rem;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
}

.btn:hover {
  background: var(--accent-dim);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-danger {
  background: #b91c1c;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 500;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  font-size: 0.75rem;
  background: var(--border);
}

.badge-on {
  background: rgba(74, 222, 128, 0.2);
  color: var(--ok);
}

.badge-off {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
}

.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.flash-ok {
  background: rgba(74, 222, 128, 0.15);
  color: var(--ok);
}

.flash-err {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
}

.module-tile {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  text-align: center;
}

.module-tile form {
  margin-top: 0.5rem;
}

@media (min-width: 768px) {
  .wrap {
    padding: 1.5rem 2rem 4rem;
  }

  h1 {
    font-size: 1.5rem;
  }
}