:root {
  --border: #d8d8d8;
  --border-strong: #b0b0b0;
  --bg: #ffffff;
  --bg-muted: #f5f6f8;
  --text: #1b1e23;
  --text-muted: #6b7280;
  --accent: #2f5fd0;
  --error: #c62828;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
  line-height: 1.4;
}

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

/* ---------- topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-muted);
}

.topbar .brand {
  font-weight: 700;
  font-size: 16px;
}

.topbar nav {
  display: flex;
  gap: 16px;
  flex: 1;
}

.topbar .logout {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.topbar .logout span {
  color: var(--text-muted);
  font-size: 13px;
}

.topbar button {
  cursor: pointer;
}

button {
  font-family: inherit;
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}

button:hover { background: var(--bg-muted); }

main {
  padding: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

h1 {
  font-size: 20px;
  margin: 0 0 12px;
}

/* ---------- login ---------- */
.login-box {
  max-width: 320px;
  margin: 80px auto;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-muted);
}

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

.login-box form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-box label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-muted);
}

.login-box input {
  font-family: inherit;
  font-size: 14px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.login-box button {
  margin-top: 8px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  padding: 8px 14px;
}

.login-box button:hover { opacity: 0.9; }

.error {
  color: var(--error);
  font-size: 13px;
  margin: 0 0 8px;
}

/* ---------- day nav ---------- */
.daynav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 13px;
}

.daynav select {
  font-family: inherit;
  font-size: 13px;
  padding: 4px 6px;
}

.empty {
  color: var(--text-muted);
}

/* ---------- cards ---------- */
.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 120px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-muted);
}

.card span {
  font-size: 12px;
  color: var(--text-muted);
}

.card b {
  font-size: 18px;
}

/* ---------- filters ---------- */
.filters {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.filters select {
  font-family: inherit;
  font-size: 13px;
  padding: 5px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

/* ---------- report table ---------- */
table.report {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}

table.report th,
table.report td {
  padding: 4px 8px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

table.report th {
  background: var(--bg-muted);
  font-weight: 600;
  white-space: nowrap;
}

table.report td small {
  color: var(--text-muted);
}

tr.emp-first td {
  border-top: 2px solid var(--border-strong);
}