* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: #f4f6f9;
  color: #1f2933;
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.45;
  min-height: 100vh;
}

a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Login screen ---------- */

body.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  min-height: 100vh;
}

.login-card {
  width: 320px;
  background: #ffffff;
  padding: 32px 28px;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.login-card h1 {
  margin: 0 0 4px;
  font-size: 28px;
  color: #2563eb;
}
.login-card .subtitle {
  margin: 0 0 24px;
  color: #6b7785;
  font-size: 14px;
}
.login-card label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  color: #6b7785;
}
.login-card input {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  border: 1px solid #d8dee6;
  border-radius: 6px;
  font-size: 15px;
}
.login-card input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.login-card button {
  width: 100%;
  margin-top: 10px;
  padding: 11px;
  background: #2563eb;
  color: #fff;
  border: 0;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
}
.login-card button:hover { background: #1d4ed8; }
.login-card .error {
  margin: 0 0 14px;
  padding: 10px 12px;
  background: #fee2e2;
  color: #b91c1c;
  border-radius: 6px;
  font-size: 13px;
}
.login-card .hint {
  margin-top: 18px;
  font-size: 12px;
  color: #6b7785;
  text-align: center;
}

/* ---------- App shell ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: #1e293b;
  color: #fff;
}
.topbar h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}
.topbar .user {
  margin-left: auto;
  font-size: 13px;
  opacity: 0.85;
}
.topbar .hamburger {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.drawer {
  position: fixed;
  top: 48px;
  bottom: 0;
  left: 0;
  width: 240px;
  background: #ffffff;
  border-right: 1px solid #d8dee6;
  padding: 16px 0;
  overflow-y: auto;
  z-index: 20;
}
.drawer nav {
  display: flex;
  flex-direction: column;
}
.drawer nav a {
  padding: 11px 22px;
  color: #1f2933;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.drawer nav a:hover {
  background: #eef2ff;
  text-decoration: none;
}
.drawer nav a.active {
  background: #eef2ff;
  color: #2563eb;
  border-left-color: #2563eb;
  font-weight: 600;
}
.drawer nav a.logout {
  margin-top: 12px;
  border-top: 1px solid #d8dee6;
  padding-top: 14px;
  color: #b91c1c;
}

.content {
  margin-left: 240px;
  padding: 22px 28px 60px;
  min-height: calc(100vh - 48px);
}
.content h2 {
  margin: 0 0 18px;
  font-size: 22px;
}

/* ---------- Data table ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  border: 1px solid #d8dee6;
  border-radius: 8px;
  overflow: hidden;
  font-size: 14px;
}
.data-table th, .data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid #d8dee6;
}
.data-table thead th {
  background: #f8fafc;
  color: #6b7785;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: #f8fafc; }
.data-table td.num, .data-table th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------- Forms ---------- */

.form-card {
  max-width: 480px;
  background: #ffffff;
  border: 1px solid #d8dee6;
  border-radius: 8px;
  padding: 22px 24px;
}
.form-card label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  color: #6b7785;
}
.form-card input, .form-card select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 9px 11px;
  border: 1px solid #d8dee6;
  border-radius: 6px;
  font-size: 15px;
  background: #fff;
  color: #1f2933;
}
.form-card input:focus, .form-card select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-card button {
  margin-top: 6px;
  padding: 10px 22px;
  background: #2563eb;
  color: #fff;
  border: 0;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
.form-card button:hover { background: #1d4ed8; }

.flash {
  margin: 0 0 18px;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 14px;
}
.flash.ok    { background: #dcfce7; color: #166534; }
.flash.error { background: #fee2e2; color: #b91c1c; }

/* ---------- Mobile ---------- */

@media (max-width: 768px) {
  .topbar .hamburger { display: inline-block; }
  .drawer {
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
  }
  .drawer.open { transform: translateX(0); }
  .content {
    margin-left: 0;
    padding: 16px;
  }
  .drawer-backdrop {
    position: fixed;
    inset: 48px 0 0 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 15;
    display: none;
  }
  .drawer-backdrop.open { display: block; }
}