:root {
  --bg: #eeeeee;
  --surface: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --border: #d4d4d8;
  --accent: #000000;
  --accent-text: #ffffff;
  --danger: #b91c1c;
  --ok: #15803d;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111111;
    --surface: #1c1c1e;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --border: #3f3f46;
    --accent: #ffffff;
    --accent-text: #000000;
    --danger: #f87171;
    --ok: #4ade80;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

input, textarea, select {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input:user-invalid { border-color: var(--danger); }
input[type="checkbox"] { width: auto; }
textarea { resize: vertical; }

label, .label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); }
label > input, label > textarea { margin-top: 4px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 8px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text);
}
.btn:disabled { opacity: .5; cursor: progress; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-ghost { border-color: var(--border); }
.btn-sm { padding: 4px 10px; font-size: 13px; }

/* Accesso */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box {
  width: min(360px, 100%);
  display: grid;
  gap: 16px;
  background: var(--surface);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.login-box h1 { margin: 0; font-size: 22px; }
.error { color: var(--danger); margin: 0; }

/* Layout */
.app { display: grid; grid-template-columns: 220px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  max-height: 100vh;
  position: sticky;
  top: 0;
}
.sidebar-head { display: flex; justify-content: space-between; align-items: center; }
.post-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.post-list button {
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.post-list button:hover { background: var(--bg); }
.post-list button.active { background: var(--accent); color: var(--accent-text); }

.main { padding: 16px 24px 48px; min-width: 0; display: grid; gap: 16px; align-content: start; }
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  padding: 8px 0;
}
.toolbar-actions { display: flex; gap: 8px; align-items: center; }
.file-name { font-weight: 700; font-family: ui-monospace, monospace; }
.status { margin-left: 8px; color: var(--muted); font-size: 13px; }

.meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.span-2 { grid-column: span 2; }
.hint { font-weight: 400; }
.hint.warn { color: var(--danger); }

.cover { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: start; }
.cover input[name="image"] { margin-top: 4px; }
.cover-actions { display: flex; gap: 16px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.check { display: inline-flex; gap: 6px; align-items: center; font-weight: 400; color: var(--text); }
.cover-preview { width: 200px; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--border); }

.editor { min-width: 0; }

.toast {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  max-width: calc(100% - 32px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: var(--radius);
  z-index: 100;
  box-shadow: 0 4px 16px rgb(0 0 0 / .2);
}
.toast a { color: inherit; }
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; max-height: 220px; border-right: 0; border-bottom: 1px solid var(--border); }
  .main { padding: 8px 16px 32px; }
  .meta { grid-template-columns: minmax(0, 1fr); }
  .span-2 { grid-column: auto; }
  .cover { grid-template-columns: minmax(0, 1fr); }
  .cover-preview { width: 100%; }
}

/* Pulsanti testuali nella barra dell'editor */
.toastui-editor-toolbar-icons.tb-text {
  background-image: none;
  width: auto;
  padding: 0 6px;
  font-size: 12px;
  font-weight: 700;
  color: inherit;
}

/* Anteprima degli embed del sito dentro l'editor */
.toastui-editor-contents .embed-preview {
  display: block;
  padding: 12px;
  margin: 8px 0;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 13px;
}