:root {
  /* Açık tema (varsayılan) */
  --bg: #f6f8fb; --panel: #ffffff; --panel-2: #f8fafc;
  --border: #e6eaf0; --border-strong: #d3dae4;
  --text: #0f172a; --muted: #64748b; --faint: #94a3b8;
  --accent: #6366f1; --accent-soft: #eef2ff;
  --ok: #16a34a; --ok-soft: #ecfdf3; --warn: #f59e0b; --warn-soft: #fffbeb;
  --danger: #dc2626; --danger-soft: #fef2f2;
  --primary-bg: #1e293b; --primary-fg: #ffffff;   /* referans: koyu-slate buton */
  --radius: 14px;
  /* Sidebar her zaman koyu */
  --sb-bg: #171f2e; --sb-text: #cbd5e1; --sb-muted: #7d8aa0;
  --sb-active: rgba(99,102,241,.18); --sb-hover: rgba(255,255,255,.05);
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.04);
}
[data-theme="dark"] {
  --bg: #0f1115; --panel: #171a21; --panel-2: #1f232c;
  --border: #2a2f3a; --border-strong: #3a414f;
  --text: #e6e9ef; --muted: #9aa3b2; --faint: #6b7484;
  --accent: #818cf8; --accent-soft: #232a44;
  --ok: #34d399; --ok-soft: #12251d; --warn: #fbbf24; --warn-soft: #2a2310;
  --danger: #f87171; --danger-soft: #2a1515;
  --primary-bg: #6366f1; --primary-fg: #ffffff;   /* koyu temada slate görünmez → indigo */
  --shadow: none;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", Roboto, "Inter", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
h1, h2 { font-weight: 600; }

.layout { display: flex; min-height: 100vh; }

/* --- Sidebar --- */
.sidebar { width: 248px; background: var(--sb-bg); color: var(--sb-text);
  display: flex; flex-direction: column; padding: 16px 14px; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 12px; padding: 6px 8px 20px; }
.brand .logo { width: 38px; height: 38px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, #6366f1, #3b82f6); display: flex; align-items: center;
  justify-content: center; color: #fff; }
.brand .name { font-size: 16px; font-weight: 600; color: #fff; }
.sidebar nav { display: flex; flex-direction: column; gap: 2px; overflow-y: auto; }
.nav-section { display: flex; flex-direction: column; }
/* Grup başlığı = açılır/kapanır tetikleyici */
.nav-group { display: flex; align-items: center; justify-content: space-between; width: 100%;
  font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--sb-muted);
  margin: 14px 0 4px; padding: 4px 11px; background: transparent; border: none; cursor: pointer;
  font-family: inherit; font-weight: 600; }
.nav-group:hover { color: #cbd5e1; }
.nav-group .chev { width: 14px; height: 14px; stroke: currentColor; transition: transform .18s ease; }
.nav-section.collapsed .chev { transform: rotate(-90deg); }
.nav-items { display: flex; flex-direction: column; gap: 2px; overflow: hidden; }
.nav-section.collapsed .nav-items { display: none; }
.sidebar nav a { display: flex; align-items: center; gap: 12px; padding: 9px 11px;
  border-radius: 9px; color: var(--sb-text); font-weight: 500; }
.sidebar nav a svg { width: 19px; height: 19px; stroke: currentColor; flex: none; }
.sidebar nav a:hover { background: var(--sb-hover); color: #fff; }
.sidebar nav a.active { background: var(--sb-active); color: #fff; box-shadow: inset 2px 0 0 var(--accent); }
.sidebar nav a .count { margin-left: auto; background: var(--accent); color: #fff;
  font-size: 11px; font-weight: 600; min-width: 20px; height: 20px; border-radius: 999px;
  display: flex; align-items: center; justify-content: center; padding: 0 6px; }
.sidebar nav a .count.warn { background: var(--warn); }
.sidebar nav a .count.danger { background: var(--danger); }
.user-block { margin-top: auto; display: flex; align-items: center; gap: 10px;
  padding: 12px 10px 4px; border-top: 1px solid rgba(255,255,255,.08); }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: #475569; color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 600; flex: none; }
.user-block .uname { font-size: 13px; font-weight: 600; color: #fff; }
.user-block .umail { font-size: 12px; color: var(--sb-muted); }

/* --- İçerik --- */
.content { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { display: flex; align-items: center; gap: 16px; padding: 16px 28px;
  border-bottom: 1px solid var(--border); background: var(--bg); position: sticky; top: 0; z-index: 5; }
.topbar h1 { font-size: 20px; margin: 0; }
.topbar .spacer { flex: 1; }
.topbar .meta { color: var(--muted); font-size: 13px; }
.icon-btn { width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--panel); color: var(--muted); cursor: pointer; display: flex;
  align-items: center; justify-content: center; }
.icon-btn svg { width: 18px; height: 18px; stroke: currentColor; }
.search { display: flex; align-items: center; gap: 8px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 9px; padding: 0 10px; height: 36px; color: var(--muted); }
.search svg { width: 16px; height: 16px; stroke: currentColor; }
.search input { border: none; background: transparent; outline: none; color: var(--text);
  font-size: 13px; width: 130px; }
.search kbd { font-size: 11px; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 5px; padding: 1px 6px; color: var(--faint); }
.page { padding: 28px; }

/* --- KPI kartları --- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 18px; }
.kpi { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow); }
.kpi-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.kpi .label { color: var(--muted); font-size: 14px; font-weight: 500; }
.kpi-ic { width: 34px; height: 34px; border-radius: 9px; background: var(--accent-soft);
  color: var(--accent); display: flex; align-items: center; justify-content: center; }
.kpi-ic svg { width: 18px; height: 18px; stroke: currentColor; }
.kpi-ic.ok { background: var(--ok-soft); color: var(--ok); }
.kpi-ic.danger { background: var(--danger-soft); color: var(--danger); }
.kpi-ic.warn { background: var(--warn-soft); color: var(--warn); }
.kpi .num { font-size: 34px; font-weight: 700; line-height: 1; letter-spacing: -.02em; }
.kpi .num.ok { color: var(--ok); } .kpi .num.danger { color: var(--danger); }

/* --- Kartlar --- */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; margin-top: 20px; box-shadow: var(--shadow); }
.card.accent { border-color: var(--accent); }
.card h2 { margin: 0 0 14px; font-size: 16px; }
.card .empty { color: var(--faint); text-align: center; padding: 28px 0; }

/* --- Tablo --- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--panel-2); }

/* --- Butonlar --- */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 15px; border-radius: 9px;
  border: 1px solid var(--border-strong); background: var(--panel); color: var(--text);
  cursor: pointer; font-size: 14px; font-weight: 500; }
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--primary-bg); border-color: var(--primary-bg); color: var(--primary-fg); }
.btn.primary:hover { filter: brightness(1.12); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn.sm { padding: 6px 11px; font-size: 13px; }

/* --- Rozetler --- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px;
  font-weight: 500; background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }

/* --- Formlar --- */
form.stack { display: flex; flex-direction: column; gap: 16px; max-width: 560px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); font-weight: 500; }
input, select { padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border-strong);
  background: var(--panel); color: var(--text); font-size: 14px; }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.row { display: flex; gap: 12px; align-items: center; }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.toolbar p { margin: 0; }
.muted { color: var(--muted); }
.checkbox { flex-direction: row; align-items: center; gap: 8px; }
.checkbox input { width: auto; }
hr { border: none; border-top: 1px solid var(--border); width: 100%; margin: 2px 0; }

/* --- Üç-nokta işlem menüsü --- */
.menu { position: relative; display: inline-block; }
.menu-btn { font-size: 18px; line-height: 1; padding: 4px 10px; }
.menu-list { display: none; position: absolute; right: 0; top: 100%; margin-top: 4px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 8px 24px rgba(16,24,40,.12); min-width: 190px; z-index: 20; padding: 6px; }
.menu-list.open { display: block; }
.menu-list a, .menu-list button { display: block; width: 100%; text-align: left; padding: 9px 11px;
  border: none; background: transparent; color: var(--text); font-size: 13px; cursor: pointer;
  border-radius: 7px; font-family: inherit; }
.menu-list a:hover, .menu-list button:hover { background: var(--panel-2); }
.menu-list button.danger { color: var(--danger); }
.menu-list form { margin: 0; max-width: none; }

/* --- Giriş / 2FA sayfaları --- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 32px; width: 100%; max-width: 380px; box-shadow: var(--shadow); }
.auth-brand { font-size: 20px; font-weight: 600; text-align: center; margin-bottom: 22px;
  display: flex; align-items: center; justify-content: center; gap: 10px; }
.logo-sq { width: 40px; height: 40px; border-radius: 10px; background: linear-gradient(135deg,#6366f1,#3b82f6);
  display: inline-flex; align-items: center; justify-content: center; font-size: 20px; }
.auth-err { background: var(--danger-soft); color: var(--danger); border-radius: 9px;
  padding: 10px 12px; font-size: 13px; margin-bottom: 16px; text-align: center; }
.auth-card form.stack { max-width: none; }

/* --- Üretilen haber gövdesi --- */
.article-body { font-size: 16px; line-height: 1.75; color: var(--text); }
.article-body p { margin: 0 0 16px; }
.article-body h2 { font-size: 20px; margin: 26px 0 12px; }
.article-body .key-points { background: var(--accent-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px 14px 36px; margin: 0 0 20px; }
.article-body .key-points ul { margin: 0; padding-left: 4px; }
.article-body .key-points li { margin: 6px 0; }
.article-body .impact { font-size: 19px; font-weight: 500; line-height: 1.5;
  border-left: 3px solid var(--accent); padding-left: 16px; margin: 22px 0; color: var(--text); }