:root {
  --bg: #f4f1ea;
  --card: #fffdf8;
  --ink: #1f1a17;
  --muted: #6d635b;
  --line: #e4dcd2;
  --primary: #2f6fed;
  --accent: #0f8a5f;
  --danger: #c0392b;
  --shadow: 0 10px 30px rgba(40, 30, 20, 0.08);
  --radius: 14px;
  font-family: "PingFang SC", "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161311;
    --card: #221e1b;
    --ink: #f5efe8;
    --muted: #b0a59b;
    --line: #3a332e;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--ink); }
body { line-height: 1.5; }
.hidden { display: none !important; }
.view { min-height: 100vh; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.error { color: var(--danger); margin-top: 0.75rem; }
.msg { margin: 0.75rem 0 0; padding: 0.75rem 1rem; border-radius: 10px; background: color-mix(in srgb, var(--primary) 12%, transparent); }
.msg.ok { background: color-mix(in srgb, var(--accent) 14%, transparent); }
.msg.err { background: color-mix(in srgb, var(--danger) 14%, transparent); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.login-card { width: min(420px, 100%); margin: 12vh auto; }
.login-card h1 { margin: 0 0 0.5rem; font-size: 1.6rem; }

.field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.field.grow { flex: 1; min-height: 0; }
.field span { font-size: 0.9rem; color: var(--muted); }
input, textarea, button {
  font: inherit;
  color: var(--ink);
}
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 80%, white);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
}
textarea { resize: vertical; min-height: 280px; line-height: 1.6; }

button {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
button.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--danger); }
button.ghost { background: transparent; }
button.small { padding: 0.35rem 0.7rem; font-size: 0.85rem; }
button:not(:disabled):hover { filter: brightness(1.03); }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 88%, transparent);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  z-index: 5;
}
.brand { display: flex; flex-direction: column; gap: 0.15rem; }
.top-actions, .actions { display: flex; flex-wrap: wrap; gap: 0.55rem; }

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  min-height: calc(100vh - 64px);
}
.sidebar {
  border-right: 1px solid var(--line);
  padding: 1rem;
  background: color-mix(in srgb, var(--card) 70%, transparent);
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }
.sidebar-head h2 { margin: 0; font-size: 1rem; }
.draft-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.4rem; }
.draft-list button {
  width: 100%;
  text-align: left;
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
}
.draft-list button.active {
  border-color: color-mix(in srgb, var(--primary) 45%, var(--line));
  background: color-mix(in srgb, var(--primary) 12%, var(--card));
}
.draft-list .title { display: block; font-weight: 600; }
.draft-list .sub { display: block; color: var(--muted); font-size: 0.8rem; margin-top: 0.15rem; }

.editor {
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
    max-height: 220px;
    overflow: auto;
  }
  textarea { min-height: 42vh; }
  .login-card { margin: 8vh 1rem; }
}

.sidebar-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 85%, transparent);
}
.sidebar-tabs .tab {
  flex: 1;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
  background: transparent;
  color: var(--muted);
}
.sidebar-tabs .tab.active {
  background: color-mix(in srgb, var(--primary) 16%, var(--card));
  color: var(--ink);
  font-weight: 600;
}
.sidebar-panel { min-height: 0; }
.mode-banner {
  margin: 0 0 1rem;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  font-size: 0.9rem;
  border: 1px solid var(--line);
}
.mode-banner.draft {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}
.mode-banner.post {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}
button.hidden { display: none !important; }