:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2563c4;
  --danger: #f87171;
  --ok: #4ade80;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0 1.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

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

.brand .brand-sep {
  color: var(--muted);
  font-weight: 400;
  margin: 0 0.25rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}

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

h1 {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  font-weight: 650;
}

h2 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

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

.flash {
  padding: 0.65rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
}

.flash.ok {
  border-color: rgba(74, 222, 128, 0.35);
  background: rgba(74, 222, 128, 0.08);
}

.flash.err {
  border-color: rgba(248, 113, 113, 0.4);
  background: rgba(248, 113, 113, 0.08);
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a26;
  color: var(--text);
  font-size: 0.95rem;
}

textarea {
  min-height: 88px;
  resize: vertical;
}

.row {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .row.cols-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  background: var(--accent);
  border-color: var(--accent-dim);
}

.btn:hover {
  filter: brightness(1.08);
  text-decoration: none;
}

.btn.secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn.danger {
  background: rgba(248, 113, 113, 0.15);
  border-color: rgba(248, 113, 113, 0.45);
  color: #fecaca;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 0.55rem 0.45rem;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
}

.table-wrap {
  overflow-x: auto;
}

.pill {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.78rem;
  background: rgba(61, 139, 253, 0.15);
  border: 1px solid rgba(61, 139, 253, 0.35);
}

.errors {
  color: #fecaca;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.login-box {
  max-width: 400px;
  margin: 3rem auto;
}

.login-box h1 {
  text-align: center;
}

.stack-user {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.stack-user h2 {
  margin-top: 0;
}

.inline-form {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.dash-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .dash-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.dash-card h2.dash-metric {
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
  color: var(--text);
  font-weight: 650;
}

.dash-sub {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
}

.dash-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0;
}

.dash-stats dt {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0;
}

.dash-stats dd {
  margin: 0.2rem 0 0;
  font-size: 0.95rem;
}

.dash-stats .highlight {
  color: var(--ok);
  font-weight: 600;
}

.dash-h3 {
  font-size: 0.88rem;
  margin: 1rem 0 0.5rem;
  color: var(--muted);
  font-weight: 600;
}

table.mini {
  font-size: 0.82rem;
}

table.mini th,
table.mini td {
  padding: 0.35rem 0.4rem;
}

.dash-matrix th.week-col {
  min-width: 2.25rem;
  text-align: center;
  font-size: 0.72rem;
  padding-left: 0.2rem;
  padding-right: 0.2rem;
}

.dash-matrix td.cell-dot {
  text-align: center;
  vertical-align: middle;
}

.dash-matrix .num {
  text-align: right;
  white-space: nowrap;
}

.dot {
  font-size: 1rem;
  line-height: 1;
}

.dot.ok {
  color: var(--ok);
}

.dot.muted {
  color: var(--border);
  font-size: 1.25rem;
}