:root {
  --bg: #0d0a0a;
  --panel: #151515;
  --panel-strong: #1d1d1d;
  --ink: #f2f2f2;
  --muted: #9c9c9c;
  --accent: #b0241a;
  --line: rgba(255, 255, 255, 0.08);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Garamond, Baskerville, Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(176, 36, 26, 0.12), transparent 22%),
    linear-gradient(180deg, #080606 0%, var(--bg) 100%);
}

.admin-login-body,
.admin-body {
  background:
    radial-gradient(circle at top right, rgba(176, 36, 26, 0.12), transparent 22%),
    linear-gradient(180deg, #010101 0%, var(--bg) 100%);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(460px, 100%);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(18, 18, 18, 0.99), rgba(8, 8, 8, 0.99));
  box-shadow: var(--shadow);
  position: relative;
}

.login-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  pointer-events: none;
}

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

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
}

.login-copy {
  color: var(--muted);
  line-height: 1.6;
}

.login-form,
.page-form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--ink);
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

button,
.public-link,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 16px;
  text-decoration: none;
}

button {
  border: 0;
  background: var(--accent);
  color: white;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(147, 31, 20, 0.22);
}

button.secondary {
  background: rgba(36, 29, 23, 0.08);
  color: var(--ink);
}

button.danger {
  background: rgba(176, 36, 26, 0.18);
  color: #ffd8d4;
  box-shadow: none;
  border: 1px solid rgba(176, 36, 26, 0.28);
}

.back-link,
.public-link {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
}

.login-message,
.save-message {
  color: var(--muted);
  margin: 0;
}

.admin-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.admin-sidebar {
  padding: 22px 18px;
  background:
    radial-gradient(circle at top, rgba(176, 36, 26, 0.14), transparent 28%),
    linear-gradient(180deg, #070707, #020202);
  color: var(--ink);
}

.admin-sidebar-header h1 {
  margin: 0;
  color: var(--ink);
}

.admin-sidebar-header p:last-child {
  color: var(--muted);
  line-height: 1.5;
}

.admin-sidebar input {
  margin: 16px 0;
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.1);
}

.admin-sidebar input::placeholder {
  color: rgba(255, 255, 255, 0.34);
}

.admin-sidebar-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.admin-tree {
  display: grid;
  gap: 2px;
}

.tree-branch {
  display: grid;
  gap: 2px;
}

.tree-item {
  border: 0;
  border-radius: 10px;
  padding: 10px 10px 10px calc(10px + (var(--depth, 0) * 18px));
  background: transparent;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  text-align: left;
  cursor: pointer;
}

.tree-item-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tree-caret {
  width: 12px;
  color: var(--muted);
}

.tree-caret.spacer {
  opacity: 0;
}

.tree-item:hover,
.tree-item.active {
  background: rgba(255, 255, 255, 0.05);
}

.admin-main {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.admin-topbar,
.page-form,
.admin-preview-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(18, 18, 18, 0.99), rgba(8, 8, 8, 0.99));
  box-shadow: var(--shadow);
  position: relative;
}

.page-form::before,
.admin-preview-card::before,
.admin-topbar::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  pointer-events: none;
}

.admin-topbar {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.admin-topbar-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.page-form {
  padding: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.admin-preview-card {
  overflow: hidden;
}

.structure-panel {
  padding: 18px 20px;
}

.child-page-list {
  display: grid;
  gap: 10px;
}

.child-page-item {
  width: 100%;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.child-page-item:hover {
  background: rgba(176, 36, 26, 0.16);
}

.preview-header {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(36, 29, 23, 0.08);
}

.admin-preview {
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(16, 16, 16, 0.94), rgba(7, 7, 7, 0.99));
  min-height: 360px;
  line-height: 1.7;
}

@media (max-width: 1080px) {
  .admin-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .admin-main,
  .admin-sidebar,
  .login-shell {
    padding: 18px;
  }

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

  .admin-topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}