:root {
  --red: #d81820;
  --ink: #111418;
  --muted: #66717f;
  --line: #dbe2ea;
  --paper: #f4f6f8;
  --white: #ffffff;
  --steel: #253240;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 28px;
  color: var(--white);
  background: #070b0f;
}

.sidebar img {
  width: 110px;
  background: var(--white);
  border-radius: 8px;
  padding: 8px;
}

.sidebar nav {
  display: grid;
  gap: 8px;
}

.tab-button,
.sidebar a,
.ghost-button,
.admin-form button {
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
}

.tab-button {
  padding: 13px 14px;
  color: rgba(255, 255, 255, 0.78);
  background: transparent;
  text-align: left;
}

.tab-button.active,
.tab-button:hover {
  color: var(--white);
  background: var(--red);
}

.sidebar a {
  margin-top: auto;
  padding: 13px 14px;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.admin-shell {
  padding: 32px clamp(22px, 4vw, 58px);
}

.admin-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 28px;
}

.admin-header span {
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(32px, 5vw, 54px);
}

h2 {
  margin-bottom: 18px;
}

.ghost-button {
  padding: 12px 16px;
  color: var(--steel);
  background: var(--white);
  border: 1px solid var(--line);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: grid;
  gap: 20px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric-grid article,
.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(17, 20, 24, 0.07);
}

.metric-grid article {
  padding: 22px;
}

.metric-grid strong {
  display: block;
  color: var(--red);
  font-size: 38px;
}

.metric-grid span,
.panel p {
  color: var(--muted);
}

.panel {
  padding: 24px;
}

.admin-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.admin-form label {
  display: grid;
  gap: 7px;
  color: var(--steel);
  font-weight: 800;
}

.admin-form label:has(textarea),
.admin-form button {
  grid-column: 1 / -1;
}

.admin-form input,
.admin-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 12px 13px;
  color: var(--ink);
  background: #fbfcfd;
}

.admin-form textarea {
  resize: vertical;
}

.admin-form button {
  justify-self: start;
  padding: 13px 18px;
  color: var(--white);
  background: var(--red);
}

.content-list {
  display: grid;
  gap: 12px;
}

.content-item {
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.content-item span {
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.content-item button {
  justify-self: start;
  border: 0;
  border-radius: 6px;
  padding: 9px 11px;
  color: var(--white);
  background: var(--steel);
  cursor: pointer;
}

.gallery-preview .images {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.gallery-preview img {
  width: 96px;
  height: 72px;
  object-fit: cover;
  border-radius: 6px;
}

.preview {
  border-left: 5px solid var(--red);
}

.snippet {
  display: grid;
  gap: 5px;
  max-width: 680px;
}

.snippet strong {
  color: #1a0dab;
  font-size: 20px;
  font-weight: 400;
}

.snippet span {
  color: #006621;
}

.snippet p {
  color: #545454;
}

@media (max-width: 860px) {
  body {
    grid-template-columns: 1fr;
  }

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

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