/* ---------- Aydınlık (varsayılan) tema ---------- */
:root, :root[data-theme="light"] {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #4f46e5;
  --border: #e5e7eb;
  --ai: #6d28d9;
  --ai-bg: #ede9fe;
  --warn-bg: #fff7e6;
  --warn-border: #f0c36d;
  --warn-text: #7a5b00;

  --admin-bg: #eef0f6;
  --admin-sidebar: #ffffff;
  --admin-sidebar-text: #4b5169;
  --admin-sidebar-hover: #eceeff;
  --admin-card: #ffffff;
  --admin-border: #e2e4f0;
  --admin-text: #1f2430;
  --admin-muted: #6b7280;
  --admin-input-bg: #ffffff;
  --badge-ok-bg: #dcfce7; --badge-ok-text: #16a34a;
  --badge-warn-bg: #fef3c7; --badge-warn-text: #b45309;
  --badge-err-bg: #fee2e2; --badge-err-text: #dc2626;
  --badge-muted-bg: #eef0f6; --badge-muted-text: #6b7280;
}

/* ---------- Karanlık tema ---------- */
:root[data-theme="dark"] {
  --bg: #14161f;
  --card: #1b1e2b;
  --text: #e7e9f2;
  --muted: #9aa0b5;
  --accent: #818cf8;
  --border: #2a2d3d;
  --ai: #a78bfa;
  --ai-bg: #2a2350;
  --warn-bg: #332a10;
  --warn-border: #5c4a12;
  --warn-text: #f0c352;

  --admin-bg: #0f1220;
  --admin-sidebar: #151934;
  --admin-sidebar-text: #a5adcf;
  --admin-sidebar-hover: #202650;
  --admin-card: #1b2044;
  --admin-border: #2a3060;
  --admin-text: #e5e7eb;
  --admin-muted: #9aa3cc;
  --admin-input-bg: #10132b;
  --badge-ok-bg: #103b25; --badge-ok-text: #4ade80;
  --badge-warn-bg: #3b2f10; --badge-warn-text: #facc15;
  --badge-err-bg: #3b1010; --badge-err-text: #f87171;
  --badge-muted-bg: #26294a; --badge-muted-text: #9aa3cc;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  transition: background-color .15s ease, color .15s ease;
}
.container { max-width: 900px; margin: 0 auto; padding: 0 16px; }

.test-banner {
  background: var(--warn-bg);
  border-bottom: 1px solid var(--warn-border);
  color: var(--warn-text);
  font-size: 13px;
  text-align: center;
  padding: 8px 12px;
}

.site-header { background: var(--card); border-bottom: 1px solid var(--border); padding: 14px 0; }
.site-header .container { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 4px; }
.site-header nav a { color: var(--muted); text-decoration: none; margin-left: 16px; }

main.container { padding: 24px 16px 48px; }

.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.breadcrumb a { color: var(--muted); }

h1 { font-size: 26px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 28px 0 10px; }

.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 16px 0 32px; }
.category-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; text-decoration: none; color: var(--text);
}
.category-card h2 { margin: 0 0 6px; font-size: 16px; }
.category-card p { margin: 0; color: var(--muted); font-size: 13px; }

.topic-row {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 10px;
}
.topic-title { font-weight: 600; text-decoration: none; color: var(--text); font-size: 16px; }
.topic-title:hover { color: var(--accent); }
.topic-meta { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.ai-user em { font-style: normal; color: var(--ai); }

.ai-badge {
  display: inline-block; background: var(--ai-bg); color: var(--ai);
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  margin-left: 6px; vertical-align: middle;
}
.ai-tag {
  display: inline-block; background: var(--ai-bg); color: var(--ai);
  font-size: 11px; padding: 1px 7px; border-radius: 999px; margin-left: 6px;
}

.topic-detail { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.post { border-top: 1px solid var(--border); padding: 16px 0; }
.post.original-post { border-top: none; }
.post-author { font-size: 14px; margin-bottom: 6px; }
.author-bio { font-size: 12.5px; color: var(--muted); margin: 2px 0 0; }
.post-body { white-space: pre-line; }
.post-footer { font-size: 12px; color: var(--muted); margin-top: 8px; }

.related-topics { margin-top: 24px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.related-topics ul { margin: 8px 0 0; padding-left: 18px; }

.pagination { margin: 20px 0; display: flex; justify-content: space-between; }
.pagination a { color: var(--accent); text-decoration: none; }

.site-footer { border-top: 1px solid var(--border); padding: 18px 0; color: var(--muted); font-size: 13px; }

/* ---------- Tema değiştirme düğmesi ---------- */
.theme-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  border-radius: 999px; width: 34px; height: 34px; cursor: pointer;
  font-size: 15px; line-height: 1; display: inline-flex; align-items: center; justify-content: center;
  margin-left: 16px;
}
.theme-toggle:hover { background: var(--ai-bg); }

/* --- Admin panel --- */
.admin-body { background: var(--admin-bg); color: var(--admin-text); min-height: 100vh; transition: background-color .15s ease, color .15s ease; }
.admin-wrap { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 220px; background: var(--admin-sidebar); border-right: 1px solid var(--admin-border);
  padding: 20px 0; flex-shrink: 0;
}
.admin-sidebar .brand-row { display: flex; align-items: center; justify-content: space-between; padding: 0 20px 20px; }
.admin-sidebar .brand { display: block; color: var(--admin-text); font-weight: 700; }
.admin-sidebar a {
  display: block; padding: 10px 20px; color: var(--admin-sidebar-text); text-decoration: none; font-size: 14px;
}
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--admin-sidebar-hover); color: var(--admin-text); }
.admin-main { flex: 1; padding: 28px 32px; }
.admin-main h1 { margin-top: 0; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 28px; }
.stat-card { background: var(--admin-card); border: 1px solid var(--admin-border); border-radius: 10px; padding: 16px; }
.stat-card .num { font-size: 26px; font-weight: 700; }
.stat-card .label { font-size: 12.5px; color: var(--admin-muted); margin-top: 4px; }

table.admin-table { width: 100%; border-collapse: collapse; background: var(--admin-card); border-radius: 10px; overflow: hidden; margin-bottom: 24px; }
table.admin-table th, table.admin-table td {
  text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--admin-border); font-size: 13.5px;
}
table.admin-table th { color: var(--admin-muted); font-weight: 600; }
.badge { padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.badge.ok { background: var(--badge-ok-bg); color: var(--badge-ok-text); }
.badge.warn { background: var(--badge-warn-bg); color: var(--badge-warn-text); }
.badge.err { background: var(--badge-err-bg); color: var(--badge-err-text); }
.badge.muted { background: var(--badge-muted-bg); color: var(--badge-muted-text); }

.admin-card { background: var(--admin-card); border: 1px solid var(--admin-border); border-radius: 10px; padding: 20px; margin-bottom: 24px; }
.admin-form label { display: block; font-size: 13px; margin: 12px 0 4px; color: var(--admin-muted); }
.admin-form input[type=text], .admin-form input[type=password], .admin-form input[type=number],
.admin-form textarea, .admin-form select {
  width: 100%; padding: 8px 10px; border-radius: 6px; border: 1px solid var(--admin-border);
  background: var(--admin-input-bg); color: var(--admin-text); font-size: 14px;
}
.admin-form textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
.admin-form button, .btn {
  background: var(--accent); color: #fff; border: none; padding: 9px 16px;
  border-radius: 6px; cursor: pointer; font-size: 14px; margin-top: 14px;
}
.btn-danger { background: #dc2626; }
.btn-small { padding: 5px 10px; font-size: 12.5px; margin-top: 0; }
.login-box { max-width: 340px; margin: 80px auto; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.error { background: var(--badge-err-bg); color: var(--badge-err-text); }
.flash.success { background: var(--badge-ok-bg); color: var(--badge-ok-text); }
.error-text { color: var(--badge-err-text); font-size: 12.5px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; color: var(--admin-muted); }
.tab-btn { background: var(--admin-input-bg); color: var(--admin-text); border: 1px solid var(--admin-border); padding: 6px 12px; border-radius: 6px; font-size: 13px; cursor: pointer; margin-right: 6px; }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }