:root {
  --blue-950: #061d38;
  --blue-900: #082c55;
  --blue-800: #0d3f78;
  --cyan-600: #18a7c8;
  --ink: #172033;
  --muted: #647184;
  --line: #dfe7ef;
  --soft: #f5f8fb;
  --white: #fff;
  --danger: #9e3030;
  --success: #1f6f3f;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

a {
  color: inherit;
}

.login-screen {
  display: grid;
  min-height: 100vh;
  place-items: center;
  background:
    radial-gradient(circle at 80% 10%, rgba(24, 167, 200, .22), transparent 28%),
    linear-gradient(120deg, var(--blue-950), var(--blue-800));
}

.login-card {
  width: min(420px, calc(100% - 32px));
  padding: 32px;
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 28px 70px rgba(0, 0, 0, .22);
}

.login-card h1,
.panel h1,
.panel h2 {
  margin: 0 0 12px;
  line-height: 1.18;
}

.login-card p,
.panel p {
  margin-top: 0;
  color: var(--muted);
}

.login-card form,
.form-grid {
  display: grid;
  gap: 16px;
}

.login-card small {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
}

.admin-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  height: 100vh;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  overflow: auto;
  background: var(--blue-950);
  color: rgba(255, 255, 255, .76);
}

.admin-brand {
  display: block;
  padding: 14px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .08);
  color: var(--white);
  font-size: 20px;
  font-weight: 900;
  text-decoration: none;
}

.sidebar nav {
  display: grid;
  gap: 6px;
}

.sidebar nav a,
.view-site,
.logout {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 12px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: rgba(255, 255, 255, .8);
  font: inherit;
  font-weight: 800;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.sidebar nav a:hover,
.sidebar nav a.active,
.view-site:hover,
.logout:hover {
  background: rgba(255, 255, 255, .1);
  color: var(--white);
}

.sidebar form {
  margin-top: auto;
}

.admin-main {
  padding: 28px;
}

.panel {
  margin-bottom: 22px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 14px 34px rgba(13, 63, 120, .06);
}

.alert {
  margin-bottom: 20px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-weight: 800;
}

.alert--success {
  background: rgba(47, 158, 91, .12);
  color: var(--success);
}

.alert--error {
  background: rgba(190, 58, 58, .12);
  color: var(--danger);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.stats article {
  padding: 18px;
  border-radius: var(--radius);
  background: var(--soft);
}

.stats strong {
  display: block;
  color: var(--blue-800);
  font-size: 34px;
  line-height: 1;
}

.stats span {
  color: var(--muted);
  font-weight: 800;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 24px;
}

.tabs a {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.tabs a.active {
  border-color: var(--cyan-600);
  background: rgba(24, 167, 200, .12);
  color: var(--blue-800);
}

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

label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 900;
}

label.wide {
  grid-column: 1 / -1;
}

input,
textarea,
select {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font: inherit;
  font-weight: 400;
}

textarea {
  resize: vertical;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  margin-top: 6px;
}

.btn {
  min-height: 46px;
  padding: 12px 18px;
  border: 0;
  border-radius: var(--radius);
  background: var(--cyan-600);
  color: var(--white);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.repeat-list {
  display: grid;
  gap: 18px;
}

.repeat-item {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.message-list {
  display: grid;
  gap: 14px;
}

.message-list article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.message-list h2 {
  font-size: 20px;
}

.message-list small {
  color: var(--muted);
}

@media (max-width: 900px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .stats,
  .form-grid,
  .repeat-item {
    grid-template-columns: 1fr;
  }

  label.wide,
  .form-actions {
    grid-column: auto;
  }
}