:root {
  --bg: #0f172a;
  --card: #1e293b;
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --error: #f43f5e;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Pretendard', 'Noto Sans KR', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 480px;
  margin: 80px auto;
  padding: 32px;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}

h1 { margin: 0 0 8px; }
.subtitle { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--card);
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

label { display: block; margin-bottom: 12px; color: var(--muted); }
input {
  width: 100%;
  padding: 10px 12px;
  margin-top: 6px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  background: #0b1220;
  color: var(--text);
}
select {
  font-size: 22.5px;
  padding: 12px;
  line-height: 1.4;
}
.filter-grid .field select,
.filter-grid .field input[type="date"],
.filter-grid .field label {
  font-size: 16px;
}
.filter-grid {
  grid-template-columns: 1.1fr 2.2fr 1.1fr 0.9fr;
}
.filter-grid .field:nth-child(2) .inline-form {
  display: grid;
  grid-template-columns: auto auto 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}
.filter-grid .field:nth-child(2) .inline-form input[type="date"] {
  width: 100%;
}

button {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #22d3ee, #0ea5e9);
  border: none;
  border-radius: 10px;
  color: #0b1220;
  font-weight: 700;
  cursor: pointer;
}

button:hover { opacity: 0.9; }
.danger {
  background: linear-gradient(135deg, #f87171, #ef4444);
  color: #fff;
}

.alert {
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 16px;
}
.alert-error { background: rgba(244, 63, 94, 0.12); color: #fecdd3; border: 1px solid rgba(244, 63, 94, 0.3); }

.hint { color: var(--muted); margin-top: 16px; font-size: 14px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.grid {
  padding: 20px;
  display: grid;
  gap: 20px;
}

.admin-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card table { width: 100%; border-collapse: collapse; }
.card th, .card td { padding: 10px; text-align: left; border-bottom: 1px solid rgba(148, 163, 184, 0.2); }
.card th { color: var(--muted); font-weight: 500; }
.card td.highlight { color: var(--accent); font-weight: 700; }
.card .muted { color: var(--muted); }

.status.pending { color: #facc15; }
.status.renewed { color: #4ade80; }
.status.overdue { color: #f87171; }
.text-danger { color: var(--error); font-weight: 700; }

.stacked-form { display: grid; gap: 12px; }
.stacked-form .field { display: grid; gap: 6px; }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline-form label { margin: 0; }
.inline-form input, .inline-form select, .inline-form button { width: auto; }
.inline-form textarea { flex: 1; min-width: 200px; }
.small-input { max-width: 120px; }
.link-button {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--text);
  text-decoration: none;
  background: #0b1220;
}
.admin-grid.column-layout { grid-template-columns: 1fr; }
.pagination { display: flex; gap: 8px; margin-top: 12px; }
.page-link {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--text);
  text-decoration: none;
}
.page-link.active {
  background: var(--accent);
  color: #0b1220;
  border-color: var(--accent);
}
.filter-grid {
  display: grid;
  grid-template-columns: 1.1fr 2.2fr 1.1fr 0.9fr;
  gap: 12px 16px;
  align-items: start;
}
.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}
.apply-row { display: flex; flex-direction: column; gap: 8px; }

@media (max-width: 768px) {
  .grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 12px; }
}