/* ==========================================================================
   B4B Demo — Otomotiv yedek parça portalı / giriş ekranı
   ========================================================================== */
:root {
    --b4b-vurgu:        #e8412c;   /* fren kaliperi kırmızısı */
    --b4b-vurgu-koyu:   #c2321f;
    --b4b-koyu:         #0e1317;
    --b4b-koyu-2:       #1b242c;
    --b4b-gri:          #6b7680;
    --b4b-acik:         #f4f6f8;
    --b4b-kenar:        #dde2e7;
    --b4b-yazi:         #1c2329;
    --b4b-golge:        0 20px 50px -20px rgba(14, 19, 23, .35);
}

html, body { height: 100%; }
body.b4b-misafir {
    margin: 0;
    background: var(--b4b-acik);
    color: var(--b4b-yazi);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* --- Sayfa iskeleti ---------------------------------------------------- */
.giris-sayfa {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
}
@media (max-width: 991.98px) {
    .giris-sayfa { grid-template-columns: 1fr; }
}

/* --- Sol tanıtım paneli ------------------------------------------------ */
.giris-tanitim {
    position: relative;
    overflow: hidden;
    flex-direction: column;
    justify-content: space-between;
    padding: 3rem 4rem;
    color: #fff;
    background:
        radial-gradient(1200px 600px at -10% 110%, rgba(232, 65, 44, .35), transparent 60%),
        linear-gradient(160deg, var(--b4b-koyu-2) 0%, var(--b4b-koyu) 70%);
}
/* lastik izi / karbon dokusu */
.tanitim-desen {
    position: absolute; inset: 0;
    background-image:
        repeating-linear-gradient(135deg, rgba(255,255,255,.035) 0 2px, transparent 2px 14px),
        repeating-linear-gradient(45deg,  rgba(255,255,255,.025) 0 2px, transparent 2px 14px);
    mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.25));
    pointer-events: none;
}
.tanitim-desen::after {
    /* hız göstergesi yayı */
    content: "";
    position: absolute; right: -180px; top: -180px;
    width: 620px; height: 620px; border-radius: 50%;
    border: 26px solid transparent;
    border-top-color: rgba(232, 65, 44, .55);
    border-right-color: rgba(255, 255, 255, .08);
    transform: rotate(-35deg);
    filter: blur(.3px);
}
.tanitim-icerik, .tanitim-alt { position: relative; z-index: 1; }

.marka { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; color: inherit; }
.marka-ikon {
    width: 44px; height: 44px; border-radius: 12px;
    display: inline-grid; place-items: center;
    background: var(--b4b-vurgu); color: #fff; font-size: 1.25rem;
    box-shadow: 0 8px 20px -8px rgba(232, 65, 44, .8);
}
.marka-ad { font-weight: 800; font-size: 1.25rem; letter-spacing: .02em; }
.marka-mobil { color: var(--b4b-yazi); margin-bottom: 2rem; }

.tanitim-baslik {
    margin: 4rem 0 1rem;
    font-size: clamp(2rem, 3.4vw, 3rem);
    font-weight: 800; line-height: 1.12; letter-spacing: -.01em;
}
.tanitim-baslik .vurgu { color: var(--b4b-vurgu); }
.tanitim-metin { max-width: 34rem; color: rgba(255,255,255,.72); font-size: 1.05rem; }

.tanitim-ozellikler { list-style: none; padding: 0; margin: 2.5rem 0 0; display: grid; gap: 1.1rem; max-width: 34rem; }
.tanitim-ozellikler li { display: flex; gap: 1rem; align-items: flex-start; }
.tanitim-ozellikler li > i {
    flex: 0 0 auto; width: 40px; height: 40px; border-radius: 10px;
    display: inline-grid; place-items: center;
    background: rgba(255,255,255,.07); color: var(--b4b-vurgu); font-size: 1rem;
    border: 1px solid rgba(255,255,255,.08);
}
.tanitim-ozellikler strong { display: block; font-weight: 700; }
.tanitim-ozellikler small  { color: rgba(255,255,255,.6); }

.tanitim-alt { display: flex; justify-content: space-between; gap: 1rem; color: rgba(255,255,255,.55); font-size: .875rem; }

/* --- Sağ form alanı ---------------------------------------------------- */
.giris-form-alan {
    display: flex; align-items: center; justify-content: center;
    padding: 2.5rem 1.25rem;
    background: #fff;
}
@media (min-width: 992px) {
    .giris-form-alan { background: var(--b4b-acik); }
}
.giris-kart {
    width: 100%; max-width: 440px;
    background: #fff; border-radius: 18px;
    padding: 2.25rem 2rem;
}
@media (min-width: 992px) {
    .giris-kart { box-shadow: var(--b4b-golge); border: 1px solid var(--b4b-kenar); }
}
.giris-baslik { font-weight: 800; font-size: 1.6rem; margin: 0 0 .35rem; }
.giris-alt-baslik { color: var(--b4b-gri); margin: 0; }

.form-label { font-weight: 600; font-size: .9rem; margin-bottom: .35rem; }
.alan .input-group-text {
    background: #fff; border-color: var(--b4b-kenar); color: var(--b4b-gri); width: 48px; justify-content: center;
}
.alan .form-control { border-color: var(--b4b-kenar); font-size: 1rem; }
.alan .form-control:focus {
    border-color: var(--b4b-vurgu);
    box-shadow: 0 0 0 .2rem rgba(232, 65, 44, .15);
}
.alan .form-control:focus + .sifre-goster,
.alan:focus-within .input-group-text { border-color: var(--b4b-vurgu); color: var(--b4b-vurgu); }
.alan .sifre-goster { border-color: var(--b4b-kenar); color: var(--b4b-gri); }
.alan .sifre-goster:hover { background: var(--b4b-acik); color: var(--b4b-yazi); }
.alan .form-control.is-invalid { z-index: 3; }

.form-check-input:checked { background-color: var(--b4b-vurgu); border-color: var(--b4b-vurgu); }
.form-check-input:focus { box-shadow: 0 0 0 .2rem rgba(232, 65, 44, .15); border-color: var(--b4b-vurgu); }

.btn-vurgu {
    --bs-btn-bg: var(--b4b-vurgu);
    --bs-btn-border-color: var(--b4b-vurgu);
    --bs-btn-hover-bg: var(--b4b-vurgu-koyu);
    --bs-btn-hover-border-color: var(--b4b-vurgu-koyu);
    --bs-btn-active-bg: var(--b4b-vurgu-koyu);
    --bs-btn-active-border-color: var(--b4b-vurgu-koyu);
    --bs-btn-color: #fff; --bs-btn-hover-color: #fff; --bs-btn-active-color: #fff;
    --bs-btn-focus-shadow-rgb: 232, 65, 44;
    font-weight: 700; letter-spacing: .01em;
    box-shadow: 0 10px 24px -10px rgba(232, 65, 44, .7);
}
.giris-baglanti { color: var(--b4b-vurgu); font-weight: 600; text-decoration: none; font-size: .9rem; }
.giris-baglanti:hover { text-decoration: underline; }

.demo-kutu {
    border: 1px dashed #c9a227; background: #fff9e6; color: #5c4a00;
    border-radius: 12px; padding: .9rem 1rem; font-size: .9rem;
}
.demo-kutu code { background: #fff; border: 1px solid #f0dd9a; border-radius: 6px; padding: .1rem .4rem; color: #5c4a00; }

.giris-altbilgi {
    margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--b4b-kenar);
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem;
    font-size: .9rem; color: var(--b4b-gri);
}

/* büyük harf dönüşümü yalnız değer için, ipucu metni normal kalsın */
.text-uppercase::placeholder { text-transform: none; }