/* ============================================================
   MUHASEBE v2 — Stil Sayfası
   ============================================================ */

:root {
    --kenar-genişlik: 230px;
    --üst-yükseklik: 56px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f5f7fa;
    color: #2d3748;
}

/* Üst bar */
.ust-bar {
    height: var(--üst-yükseklik);
    position: sticky;
    top: 0;
    z-index: 1030;
}

/* Düzen */
.düzen {
    min-height: calc(100vh - var(--üst-yükseklik));
    align-items: stretch;
}

/* Kenar menü */
.kenar {
    width: var(--kenar-genişlik);
    min-width: var(--kenar-genişlik);
    background: #ffffff;
    border-right: 1px solid #e2e8f0;
    overflow-y: auto;
    height: calc(100vh - var(--üst-yükseklik));
    position: sticky;
    top: var(--üst-yükseklik);
}
.kenar .nav-link {
    color: #4a5568;
    border-radius: 6px;
    padding: 7px 12px;
    margin-bottom: 1px;
    font-size: 14px;
}
.kenar .nav-link:hover { background: #edf2f7; color: #2d3748; }
.kenar .nav-link.active { background: #4299e1; color: white; font-weight: 500; }
.kenar .nav-link.active i { color: white; }
.kenar .nav-link i { width: 18px; text-align: center; margin-right: 6px; }
.kenar-baslik {
    color: #a0aec0;
    text-transform: uppercase;
    font-size: 11px;
    font-weight: 700;
    padding: 8px 12px 4px;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .kenar {
        position: fixed;
        left: -100%;
        top: var(--üst-yükseklik);
        height: calc(100vh - var(--üst-yükseklik));
        transition: left 0.2s;
        z-index: 1020;
        box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    }
    .kenar.acik { left: 0; }
}

/* İçerik */
.içerik {
    flex: 1;
    min-width: 0;
    background: #f5f7fa;
}

/* Kartlar */
.kart-kpi {
    background: white;
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.07);
    border-left: 4px solid #4299e1;
}
.kart-kpi .etiket { color: #718096; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
.kart-kpi .değer { font-size: 26px; font-weight: 700; color: #2d3748; margin-top: 4px; }
.kart-kpi.yeşil { border-left-color: #48bb78; }
.kart-kpi.kırmızı { border-left-color: #f56565; }
.kart-kpi.sarı { border-left-color: #ecc94b; }
.kart-kpi.mor { border-left-color: #9f7aea; }

/* Tablolar */
.table { background: white; }
.table thead th { background: #edf2f7; color: #4a5568; font-weight: 600; border-bottom: 2px solid #cbd5e0; }
.table-hover tbody tr:hover { background: #f7fafc; }

/* Form */
.form-label { font-weight: 500; color: #4a5568; font-size: 13px; }
.zorunlu::after { content: ' *'; color: #e53e3e; }

/* Sayfa başlığı */
.sayfa-baslik {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e2e8f0;
}
.sayfa-baslik h1 { font-size: 22px; font-weight: 600; margin: 0; color: #2d3748; }

/* POS / Hızlı Satış */
.pos-konteyner { display: grid; grid-template-columns: 1fr 380px; gap: 16px; }
.pos-sol, .pos-sag { background: white; border-radius: 10px; padding: 18px; box-shadow: 0 1px 3px rgba(0,0,0,0.07); }
.pos-barkod-girdi {
    font-size: 18px; padding: 14px; border: 2px solid #4299e1; border-radius: 8px;
}
.pos-barkod-girdi:focus { border-color: #2b6cb0; box-shadow: 0 0 0 3px rgba(66,153,225,0.2); }
.pos-sepet { max-height: 50vh; overflow-y: auto; }
.pos-toplam-kutu { font-size: 28px; font-weight: 700; color: #2d3748; text-align: right; padding: 12px; background: #f7fafc; border-radius: 8px; }
.pos-buton { padding: 14px; font-size: 18px; font-weight: 600; }

@media (max-width: 992px) {
    .pos-konteyner { grid-template-columns: 1fr; }
}

/* Giriş ekranı */
.giris-konteyner {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}
.giris-kart {
    background: white;
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.giris-kart h1 { text-align: center; color: #2d3748; margin-bottom: 30px; font-size: 24px; }

/* Yardımcı */
.silindi { background-color: #fed7d7 !important; }
.pasif { opacity: 0.55; }
.kritik-stok { color: #c53030; font-weight: 600; }
.bakiye-borç { color: #c53030; font-weight: 600; }
.bakiye-alacak { color: #2f855a; font-weight: 600; }
.bakiye-sıfır { color: #718096; }

/* Yazdırma */
@media print {
    .kenar, .ust-bar, footer, .baski-gizle { display: none !important; }
    .içerik { margin: 0; padding: 0; }
    .düzen { display: block; }
}