:root {
  --renk-koyu: #0f3d63;
  --renk-ana: #1a5c96;
  --renk-acik: #eaf2f8;
  --renk-baslik-metin: #0f3d63;
  --renk-metin: #1c2b36;
  --renk-metin-ikincil: #55667a;
  --renk-hata: #b3261e;
  --renk-basari: #1b7a3d;
  --renk-uyari: #a15c00;
  --renk-kenar: #d3dde5;
  --renk-govde-bg: #f4f7f9;
  --renk-yuzey: #ffffff;
  --renk-yuzey-hover: #fafcfe;
  --renk-golge: rgba(15, 23, 32, 0.25);
  --kutu-hata-bg: #fdecea;
  --kutu-hata-kenar: #f5c2be;
  --kutu-basari-bg: #eaf7ee;
  --kutu-basari-kenar: #bfe3c8;
  --kutu-uyari-bg: #fdf3e0;
  --kutu-uyari-kenar: #f0d79a;
  --kutu-bilgi-kenar: #b7d3e8;
  --yaricap: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --renk-koyu: #123048;
    --renk-ana: #3a82c4;
    --renk-acik: #16283a;
    --renk-baslik-metin: #7db8ea;
    --renk-metin: #dde6ee;
    --renk-metin-ikincil: #96a7ba;
    --renk-hata: #ff8a80;
    --renk-basari: #6fd39a;
    --renk-uyari: #f2b84b;
    --renk-kenar: #2c3e50;
    --renk-govde-bg: #0f1720;
    --renk-yuzey: #182430;
    --renk-yuzey-hover: #1e2c3a;
    --renk-golge: rgba(0, 0, 0, 0.55);
    --kutu-hata-bg: #3a1f1c;
    --kutu-hata-kenar: #5c2e29;
    --kutu-basari-bg: #1c3326;
    --kutu-basari-kenar: #2c5540;
    --kutu-uyari-bg: #3a2e15;
    --kutu-uyari-kenar: #5c4a22;
    --kutu-bilgi-kenar: #274a63;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --renk-koyu: #123048;
  --renk-ana: #3a82c4;
  --renk-acik: #16283a;
  --renk-baslik-metin: #7db8ea;
  --renk-metin: #dde6ee;
  --renk-metin-ikincil: #96a7ba;
  --renk-hata: #ff8a80;
  --renk-basari: #6fd39a;
  --renk-uyari: #f2b84b;
  --renk-kenar: #2c3e50;
  --renk-govde-bg: #0f1720;
  --renk-yuzey: #182430;
  --renk-yuzey-hover: #1e2c3a;
  --renk-golge: rgba(0, 0, 0, 0.55);
  --kutu-hata-bg: #3a1f1c;
  --kutu-hata-kenar: #5c2e29;
  --kutu-basari-bg: #1c3326;
  --kutu-basari-kenar: #2c5540;
  --kutu-uyari-bg: #3a2e15;
  --kutu-uyari-kenar: #5c4a22;
  --kutu-bilgi-kenar: #274a63;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--renk-metin);
  background: var(--renk-govde-bg);
}

a { color: var(--renk-ana); }

input, select, textarea, button { font-family: inherit; }
input[type="text"], input[type="password"], input[type="date"], input[type="number"], select, textarea {
  background: var(--renk-yuzey);
  color: var(--renk-metin);
}

/* ---- Giris sayfasi ---- */
.giris-govde {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--renk-koyu), var(--renk-ana));
}

.giris-kutu {
  background: var(--renk-yuzey);
  padding: 40px;
  border-radius: var(--yaricap);
  box-shadow: 0 10px 40px var(--renk-golge);
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.giris-logo { max-width: 90px; margin-bottom: 12px; }

.giris-kutu h1 { font-size: 1.4rem; margin: 0 0 6px; color: var(--renk-baslik-metin); }
.giris-kutu h2 { font-size: 0.85rem; font-weight: 400; color: var(--renk-metin-ikincil); margin: 0 0 24px; line-height: 1.4; }

.giris-kutu form { text-align: left; }
.giris-kutu label { display: block; font-size: 0.85rem; margin: 12px 0 4px; font-weight: 600; }
.giris-kutu input[type="text"],
.giris-kutu input[type="password"] {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yaricap);
  font-size: 1rem;
}
.checkbox-satir { display: flex !important; align-items: center; gap: 8px; font-weight: 400 !important; }
.checkbox-satir input { width: auto; }

.giris-kutu button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  background: var(--renk-ana);
  color: #fff;
  border: none;
  border-radius: var(--yaricap);
  font-size: 1rem;
  cursor: pointer;
}
.giris-kutu button:hover { background: var(--renk-koyu); }
.giris-kutu button:disabled { opacity: 0.6; cursor: default; }

.hata-mesaji { color: var(--renk-hata); font-size: 0.85rem; min-height: 1.2em; margin-top: 10px; }

/* ---- Navbar ---- */
.navbar-ust {
  background: var(--renk-koyu);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
}
.navbar-baslik { font-weight: 600; }
.navbar-kullanici { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; }
.navbar-kullanici button {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: var(--yaricap);
  padding: 6px 12px;
  cursor: pointer;
}
.navbar-kullanici button:hover { background: rgba(255,255,255,0.3); }
.tema-btn { padding: 6px 10px !important; font-size: 1rem; line-height: 1; }

.navbar-menu {
  background: var(--renk-ana);
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 0 12px;
}
.navbar-menu a {
  color: #fff;
  text-decoration: none;
  padding: 10px 14px;
  font-size: 0.88rem;
  border-bottom: 3px solid transparent;
}
.navbar-menu a:hover { background: rgba(255,255,255,0.12); }
.navbar-menu a.aktif { border-bottom-color: #fff; font-weight: 600; background: rgba(255,255,255,0.12); }

/* ---- Icerik ---- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.kart {
  background: var(--renk-yuzey);
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yaricap);
  padding: 20px;
  margin-bottom: 20px;
}

.kart h2 { margin-top: 0; font-size: 1.15rem; color: var(--renk-baslik-metin); }

.form-satir { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 14px; }
.form-alan { flex: 1; min-width: 160px; }
.form-alan label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 4px; }
.form-alan input, .form-alan select {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yaricap);
}

button, .buton {
  background: var(--renk-ana);
  color: #fff;
  border: none;
  border-radius: var(--yaricap);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.92rem;
}
button:hover, .buton:hover { background: var(--renk-koyu); }
button:disabled { opacity: 0.6; cursor: default; }
button.tehlike, .buton.tehlike { background: var(--renk-hata); color: #2b0806; }
button.tehlike:hover, .buton.tehlike:hover { filter: brightness(0.88); }
button.ikincil, .buton.ikincil { background: #6b7c88; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--renk-kenar); text-align: left; }
th { background: var(--renk-acik); font-weight: 600; }
tr:hover td { background: var(--renk-yuzey-hover); }

.uyari-kutu { padding: 12px 16px; border-radius: var(--yaricap); margin: 10px 0; font-size: 0.9rem; }
.uyari-kutu.hata { background: var(--kutu-hata-bg); color: var(--renk-hata); border: 1px solid var(--kutu-hata-kenar); }
.uyari-kutu.basari { background: var(--kutu-basari-bg); color: var(--renk-basari); border: 1px solid var(--kutu-basari-kenar); }
.uyari-kutu.bilgi { background: var(--renk-acik); color: var(--renk-baslik-metin); border: 1px solid var(--kutu-bilgi-kenar); }
.uyari-kutu.uyari { background: var(--kutu-uyari-bg); color: var(--renk-uyari); border: 1px solid var(--kutu-uyari-kenar); }

.metrik-satir { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.metrik { background: var(--renk-acik); border-radius: var(--yaricap); padding: 14px 18px; min-width: 160px; }
.metrik .etiket { font-size: 0.78rem; color: var(--renk-metin-ikincil); }
.metrik .deger { font-size: 1.3rem; font-weight: 700; color: var(--renk-baslik-metin); }

.dashboard-izgara { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.dashboard-kart {
  display: block;
  background: var(--renk-yuzey);
  border: 1px solid var(--renk-kenar);
  border-radius: var(--yaricap);
  padding: 20px;
  text-decoration: none;
  color: var(--renk-metin);
  transition: box-shadow 0.15s, transform 0.15s;
}
.dashboard-kart:hover { box-shadow: 0 4px 16px var(--renk-golge); transform: translateY(-2px); }
.dashboard-kart .simge { font-size: 1.6rem; }
.dashboard-kart .baslik { font-weight: 600; margin-top: 6px; }

.tablo-sarmalayici { overflow-x: auto; }

.rozet { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.rozet.odendi { background: var(--kutu-basari-bg); color: var(--renk-basari); }
.rozet.bekliyor { background: var(--kutu-uyari-bg); color: var(--renk-uyari); }