* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #f4f6fb;
  color: #1e293b;
  min-height: 100vh;
}

header {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: white;
  padding: 24px 32px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
header h1 { font-size: 1.7rem; }
header .alt { opacity: 0.85; font-size: 0.95rem; margin-top: 6px; }

.sekmeler {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 32px;
  background: white;
  border-bottom: 1px solid #e2e8f0;
}
.sekm {
  border: 1px solid #cbd5e1;
  background: white;
  color: #475569;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}
.sekm:hover { background: #f1f5f9; }
.sekm.secili {
  background: #2563eb;
  border-color: #2563eb;
  color: white;
}

main { padding: 24px 32px; max-width: 1200px; margin: 0 auto; }

.panel { display: none; }
.panel.aktif { display: block; animation: fadeIn 0.25s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px);} to { opacity: 1; transform: none;} }

.kart {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.kart h2 { font-size: 1.15rem; margin-bottom: 14px; color: #1e3a8a; }

form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
form input, form select {
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.95rem;
  min-width: 160px;
  flex: 1;
}
form input:focus, form select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,0.15); }
.btn-ekle { background: #16a34a; color: white; }
.btn-transfer { background: #2563eb; color: white; }
.btn-sil {
  background: transparent; color: #dc2626; padding: 6px 10px;
  border: 1px solid #fecaca; border-radius: 6px;
}

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #eef2f7; font-size: 0.93rem; }
th { background: #f8fafc; color: #64748b; font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.5px; }
tr:hover td { background: #f8fafc; }

.mesaj { margin-top: 12px; font-size: 0.9rem; }
.mesaj.ok { color: #16a34a; }
.mesaj.hata { color: #dc2626; }

/* Stok görünümü kartları */
.stok-blok { margin-bottom: 16px; }
.stok-blok h3 { color: #1e3a8a; margin-bottom: 8px; font-size: 1.05rem; }

/* Düşük stok rozetleri */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 0.78rem; font-weight: 700;
}
.badge.dusuk { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
.badge.iyi { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }

.uyari-satir { background: #fff7ed; }

@media (max-width: 600px) {
  main, .sekmeler { padding: 16px; }
  header { padding: 18px; }
  form { flex-direction: column; }
  form input, form select { width: 100%; min-width: 0; }
}