:root {
  --bg: #0b1020;
  --panel: #141b2f;
  --panel-2: #1a233d;
  --text: #edf2ff;
  --muted: #9fb0d1;
  --border: #2a3758;
  --accent: #7ea0ff;
  --accent-2: #8affd4;
  --danger: #ff7b7b;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at top, #162341, var(--bg) 42%);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

.container {
  width: min(1080px, 94%);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(11, 16, 32, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  gap: 8px;
}

.nav a {
  color: var(--muted);
  padding: 7px 10px;
  border-radius: 9px;
}

.nav a:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 22px 0 40px;
}

.main-card,
.side-card,
.post-card,
.comment-card,
.form-card {
  border: 1px solid var(--border);
  background: rgba(20, 27, 47, 0.82);
  border-radius: 14px;
}

.main-card,
.form-card { padding: 16px; }

.heading-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.title {
  margin: 0;
  font-size: 1.2rem;
}

.muted { color: var(--muted); }
.small { font-size: 0.86rem; }

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 12px;
  font-size: 0.92rem;
  background: #1b2440;
}

.btn:hover { filter: brightness(1.06); }
.btn.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #688cff);
}
.btn.danger {
  background: rgba(255, 123, 123, 0.13);
  color: #ffd1d1;
  border-color: rgba(255, 123, 123, 0.4);
}

.post-grid {
  display: grid;
  gap: 10px;
}

.post-card {
  padding: 14px;
}

.post-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.post-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

input, textarea {
  width: 100%;
  color: var(--text);
  background: #10172b;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  margin-top: 6px;
  margin-bottom: 12px;
}

label {
  color: #c9d5f5;
  font-size: 0.9rem;
}

.comment-list {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.comment-card {
  padding: 12px;
}

.comment-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.side-col { display: grid; gap: 12px; align-content: start; }
.side-card { padding: 14px; }
.side-card h4 { margin: 0 0 8px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span {
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--muted);
  padding: 4px 10px;
}

hr.sep {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .nav { display: none; }
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--text);
}

body[data-theme="atelier"] {
  --bg: #f5ebde;
  --panel: #fff3e6;
  --panel-2: #f8ead8;
  --text: #2a211a;
  --muted: #6e5d4f;
  --border: #d8c2a8;
  --accent: #be7a42;
  --accent-2: #7f57e8;
  --danger: #b25a5a;
  background: radial-gradient(circle at top, #fff6ea, #f3e4d1 44%);
}

body[data-theme="atelier"] .topbar {
  background: rgba(251, 241, 228, 0.9);
}

body[data-theme="atelier"] .nav a:hover,
body[data-theme="atelier"] .theme-toggle {
  background: rgba(122, 93, 63, 0.12);
  color: #5f5247;
}

body[data-theme="atelier"] .main-card,
body[data-theme="atelier"] .side-card,
body[data-theme="atelier"] .post-card,
body[data-theme="atelier"] .comment-card,
body[data-theme="atelier"] .form-card {
  background: rgba(255, 247, 237, 0.92);
}

body[data-theme="atelier"] .btn.primary {
  background: linear-gradient(135deg, #c37a42, #b56635);
  color: #fff8f2;
}

body[data-theme="atelier"] input,
body[data-theme="atelier"] textarea {
  background: #fff8ef;
}

body[data-theme="atelier"] label,
body[data-theme="atelier"] .brand {
  color: #3a2c21;
}