:root {
  --primary: #174a96;
  --primary-dark: #0f3471;
  --bg: #f4f6fb;
  --text: #202124;
  --muted: #5f6368;
  --border: #dfe3ea;
  --danger: #b3261e;
  --success: #137333;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: "Segoe UI", Arial, sans-serif;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card,
.panel {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 14px 35px rgba(15, 35, 80, 0.08);
}

.login-card {
  max-width: 410px;
  padding: 28px;
}

.login-card h1,
.panel h2,
.admin-header h1 {
  margin: 0;
}

.login-card p,
.admin-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

form {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

label {
  display: grid;
  gap: 6px;
  color: #333333;
  font-weight: 600;
}

input,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 11px 12px;
  color: var(--text);
  font: inherit;
}

input:focus,
select:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(23, 74, 150, 0.15);
}

button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 0;
  border-radius: 9px;
  padding: 10px 16px;
  background: var(--primary);
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover,
button:focus {
  background: var(--primary-dark);
}

.button-secondary {
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--primary);
}

.alert {
  margin-top: 16px;
  border-radius: 9px;
  padding: 10px 12px;
  font-weight: 600;
}

.alert.error {
  color: var(--danger);
  background: #fceeee;
}

.alert.success {
  color: var(--success);
  background: #eaf6ed;
}

.admin-header {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  padding: 26px 32px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

.admin-header nav {
  display: flex;
  gap: 14px;
}

.admin-layout {
  display: grid;
  gap: 22px;
  padding: 24px 32px 40px;
}

.panel {
  padding: 22px;
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid button,
.form-grid .button-secondary {
  align-self: end;
}

.checkbox-label {
  display: flex;
  gap: 8px;
  align-items: center;
}

.checkbox-label input {
  width: auto;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

@media (max-width: 760px) {
  .admin-header {
    display: block;
    padding: 20px;
  }

  .admin-header nav {
    margin-top: 12px;
  }

  .admin-layout {
    padding: 18px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}