:root {
  --navy-950: #06101f;
  --navy-900: #0a1b33;
  --navy-800: #102847;
  --navy-100: #e6edf7;
  --navy-50: #f2f6fb;
  --signal-600: #4b8b1f;
  --signal-500: #63a82b;
  --signal-100: #eaf8d9;
  --surface: #f6f7f9;
  --card: #ffffff;
  --border: #e3e6eb;
  --ink: #10151d;
  --muted: #5a6472;
  --danger: #b3261e;
  --radius: 14px;
  --shadow-card: 0 12px 32px rgba(10, 20, 40, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--surface);
  color: var(--ink);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--navy-950);
  color: #fff;
}
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.topbar .brand img { height: 22px; }
.topbar nav { display: flex; align-items: center; gap: 18px; font-size: 14px; }
.topbar nav a { color: #c7d3e6; text-decoration: none; }
.topbar nav a.active, .topbar nav a:hover { color: #fff; }
.topbar form { margin: 0; }
.topbar button { background: none; border: 1px solid rgba(255,255,255,0.3); color: #fff; padding: 6px 12px; border-radius: 8px; font-size: 13px; cursor: pointer; }

.wrap { max-width: 560px; margin: 0 auto; padding: 24px 16px 60px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-card); margin-bottom: 20px; }

.profile-row { display: flex; align-items: center; gap: 14px; }
.profile-row .avatar { width: 52px; height: 52px; border-radius: 50%; background: var(--navy-100); object-fit: cover; }
.profile-row .name { font-weight: 700; font-size: 17px; }
.profile-row .meta { color: var(--muted); font-size: 13px; }

.status-badge { display: inline-block; padding: 6px 14px; border-radius: 999px; font-weight: 700; font-size: 13px; letter-spacing: 0.02em; }
.status-not-checked-in { background: var(--navy-100); color: var(--navy-900); }
.status-checked-in { background: var(--signal-100); color: var(--signal-600); }
.status-completed { background: #eef1f5; color: var(--muted); }

.attendance-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 18px 0; text-align: center; }
.attendance-grid .stat-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.attendance-grid .stat-value { font-size: 20px; font-weight: 700; margin-top: 4px; }

.btn-action {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: var(--radius);
  border: none;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}
.btn-check-in { background: var(--signal-500); color: #fff; }
.btn-check-in:disabled { background: #b9c9d4; cursor: not-allowed; }
.btn-check-out { background: var(--navy-900); color: #fff; }
.btn-check-out:disabled { background: #b9c9d4; cursor: not-allowed; }

.action-message { margin-top: 10px; font-size: 13px; text-align: center; min-height: 18px; }
.action-message.error { color: var(--danger); }
.action-message.success { color: var(--signal-600); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }

.flash { padding: 10px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 14px; }
.flash-error { background: #fbeceb; color: var(--danger); }
.flash-success { background: var(--signal-100); color: var(--signal-600); }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 16px;
}
.error { color: var(--danger); font-size: 12px; margin-top: 4px; }

.standalone-shell { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; background: var(--navy-950); }
.standalone-card { background: #fff; border-radius: 18px; padding: 32px; width: 100%; max-width: 380px; box-shadow: 0 24px 60px rgba(0,0,0,0.3); }
.standalone-card .logo { height: 32px; margin-bottom: 18px; }
.standalone-card h1 { font-size: 20px; margin: 0 0 4px; }
.standalone-card .subtitle { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.btn-block { width: 100%; padding: 14px; border-radius: 10px; border: none; background: var(--signal-500); color: #fff; font-weight: 700; font-size: 15px; cursor: pointer; }

.hint { color: var(--muted); font-size: 12px; margin-top: 20px; text-align: center; }

@media (max-width: 480px) {
  .attendance-grid { grid-template-columns: 1fr 1fr; }
  .topbar nav { gap: 10px; font-size: 13px; }
}