:root {
    --bg: #f3f1eb;
    --panel: #fffcf7;
    --ink: #1c2430;
    --muted: #5f6b7a;
    --line: #ddd5c8;
    --accent: #0f6b5c;
    --sidebar: #15232e;
    --good: #1f7a4c;
    --warn: #a15c00;
    --bad: #a12828;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
    font-family: "Segoe UI", Candara, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #efe9dd 0%, var(--bg) 100%);
}
.app { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar {
    background: linear-gradient(180deg, #101c26 0%, var(--sidebar) 100%);
    color: #d7e0e8;
    padding: 1.4rem 1rem;
}
.brand { display: flex; gap: .8rem; align-items: center; margin-bottom: 1.5rem; }
.mark {
    width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--accent), #1a9a84); color: #fff; font-weight: 700;
}
.brand-logo {
    width: 42px; height: 42px; border-radius: 12px; object-fit: contain;
    background: #fff; padding: 2px; flex-shrink: 0;
}
.brand strong { display: block; color: #fff; }
.brand small { color: #8fa0b0; }
.sidebar nav a, .sidebar .nav-cikis button {
    display: block; color: #d7e0e8; text-decoration: none; padding: .55rem .7rem; border-radius: 8px;
    width: 100%; text-align: left; background: transparent; border: 0; font: inherit; cursor: pointer;
}
.sidebar .nav-cikis { margin: 0; }
.sidebar nav a:hover, .sidebar .nav-cikis button:hover { background: rgba(255,255,255,.08); }
.user { margin-top: 2rem; font-size: .9rem; color: #b7c4d0; }
.main { padding: 0; }
.top { padding: 1.2rem 1.5rem 0; }
.top h1 { margin: 0; font-size: 1.4rem; }
.content { padding: 1.2rem 1.5rem 2rem; }
.panel {
    background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
    padding: 1.25rem; box-shadow: 0 10px 30px rgba(21,35,46,.08);
}
.form-row { margin-bottom: 1rem; }
label { display: block; font-weight: 600; margin-bottom: .35rem; }
input, select {
    width: 100%; padding: .55rem .7rem; border: 1px solid var(--line); border-radius: 8px; font: inherit;
}
.teklif-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem 1.25rem;
    margin-bottom: 1.25rem;
}
.teklif-meta .form-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
    flex: 0 0 auto;
}
.teklif-meta label {
    display: inline;
    margin-bottom: 0;
    white-space: nowrap;
}
.teklif-meta input {
    width: auto;
    max-width: none;
}
.teklif-meta #teslim_suresi_gun { width: 5.25rem; }
.teklif-meta #gecerlilik_tarihi { width: 10.5rem; }
.fiyat-tablo {
    table-layout: fixed;
}
.fiyat-tablo .col-urun-kodu { width: 8rem; }
.fiyat-tablo .col-adet { width: 5rem; }
.fiyat-tablo .col-birim-fiyat { width: 14rem; }
.fiyat-tablo .col-toplam { width: 12rem; }
.fiyat-tablo .col-para-birimi { width: 4.5rem; }
.fiyat-tablo th.num, .fiyat-tablo td.num { text-align: right; }
.fiyat-tablo .birim-fiyat-hucre,
.fiyat-tablo .toplam-hucre {
    white-space: nowrap;
}
.fiyat-input {
    width: 100%;
    min-width: 0;
    text-align: right;
    font-variant-numeric: tabular-nums;
}
.btn {
    display: inline-block; border: 0; border-radius: 8px; padding: .55rem 1rem; font: inherit; cursor: pointer;
    text-decoration: none; color: #fff; background: var(--accent);
}
.btn-secondary { background: #5f6b7a; }
.alert { padding: .8rem 1rem; border-radius: 10px; margin-bottom: 1rem; }
.alert-ok { background: #e7f6ee; color: var(--good); }
.alert-hata { background: #fdecec; color: var(--bad); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .6rem .5rem; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--muted); font-size: .85rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; padding: .15rem .5rem; border-radius: 999px; font-size: .78rem; }
.badge-warn { background: #fff4e0; color: var(--warn); }
.badge-good { background: #e7f6ee; color: var(--good); }
.muted { color: var(--muted); }
.login-wrap { max-width: 420px; margin: 3rem auto; }
.form-actions { text-align: center; margin: .25rem 0 0; }
.form-actions .btn { margin: 0 .25rem; }
.gecersiz-panel { text-align: center; }
.gecersiz-panel .alert { text-align: center; }
.iyi-gunler { margin: 0; font-size: 2rem; font-weight: 700; color: var(--accent); }
.modal-overlay {
    position: fixed; inset: 0; background: rgba(21, 35, 46, .55);
    display: flex; align-items: center; justify-content: center; z-index: 50; padding: 1rem;
}
.modal-kutu {
    background: var(--panel); border-radius: 16px; max-width: 480px; width: 100%;
    padding: 1.4rem 1.5rem; box-shadow: 0 20px 50px rgba(21,35,46,.25); line-height: 1.5;
}
@media (max-width: 800px) {
    .app { grid-template-columns: 1fr; }
    .sidebar { height: auto; }
}