/* ==========================================================================
   Stok Cepte — Tanıtım Sitesi Tasarım Sistemi (Revizyon 3)
   ========================================================================== */

:root {
    --bg-primary: #f2f2f7;
    --bg-card: #ffffff;
    --bg-card-secondary: #f8fafc;
    --text-primary: #1c1c1e;
    --text-secondary: #636366;
    --text-tertiary: #8e8e93;
    --accent: #007aff;
    --accent-hover: #0062cc;
    --accent-light: #e5f1ff;
    --border: rgba(60, 60, 67, 0.12);
    --border-subtle: rgba(60, 60, 67, 0.08);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-pill: 9999px;
    --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.kapsayici {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Üst Şerit (Header)
   ========================================================================== */

.ust-serit {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(242, 242, 247, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.ust-serit-icerik {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.marka {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.marka-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: block;
}

.ust-eylemler {
    display: flex;
    align-items: center;
    gap: 8px;
}

.baglanti-giris {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14.5px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.baglanti-giris:hover {
    color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.04);
}

.dugme-vurgu {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background-color: var(--accent);
    color: #ffffff !important;
    text-decoration: none;
    font-size: 14.5px;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    transition: background-color 0.15s ease, transform 0.15s ease;
    white-space: nowrap;
}

.dugme-vurgu:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* ==========================================================================
   Hero Bölümü — İki Sütun, Sol Hizalı
   ========================================================================== */

.hero {
    background-color: var(--bg-primary);
    padding: 64px 0 80px 0;
}

.hero-izgara {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: center;
}

.hero-sol {
    text-align: left;
}

.hero h1 {
    font-size: clamp(34px, 4.5vw, 52px);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hero-aciklama {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-eylemler {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
}

.hero-buton-grubu {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.rozet-baglanti {
    display: inline-flex;
    align-items: center;
    line-height: 0;
    text-decoration: none;
    transition: transform 0.15s ease, opacity 0.15s ease;
    border-radius: 10px;
}

.rozet-baglanti:hover {
    transform: translateY(-2px);
    opacity: 0.92;
}

.app-store-rozet {
    display: block;
    height: 52px;
    width: auto;
    border-radius: 10px;
}

.dugme-buyuk {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: var(--accent);
    color: #ffffff;
    text-decoration: none;
    font-size: 16.5px;
    font-weight: 700;
    height: 52px;
    padding: 0 32px;
    border-radius: var(--radius-pill);
    transition: background-color 0.15s ease, transform 0.15s ease;
    box-sizing: border-box;
}

.dugme-buyuk:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.dugme-ikincil {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-strong, #c6c6c8);
    text-decoration: none;
    font-size: 15.5px;
    font-weight: 600;
    height: 52px;
    padding: 0 24px;
    border-radius: var(--radius-pill);
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease, color 0.15s ease;
    box-sizing: border-box;
    white-space: nowrap;
}

.dugme-ikincil:hover {
    background-color: rgba(0, 0, 0, 0.04);
    border-color: var(--text-primary);
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-ek-bilgiler {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.hero-ek-bilgi {
    font-size: 13.5px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.ayrac-nokta {
    color: var(--text-tertiary);
    font-size: 13.5px;
}

/* ==========================================================================
   Telefon Çerçevesi (Gerçek Ekran Görüntüleri için)
   ========================================================================== */

.hero-sag {
    display: flex;
    justify-content: center;
}

.telefon-cerceve {
    width: 290px;
    max-width: 100%;
    background-color: #000000;
    border: 3px solid rgba(60, 60, 67, 0.18);
    border-radius: 38px;
    padding: 6px;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.14), 0 2px 8px rgba(0, 0, 0, 0.06);
    user-select: none;
    line-height: 0;
}

.telefon-cerceve.kucuk {
    width: 250px;
    border-radius: 34px;
    padding: 5px;
}

.ekran-gorseli {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 32px;
    aspect-ratio: 370 / 804;
    object-fit: cover;
}

.telefon-cerceve.kucuk .ekran-gorseli {
    border-radius: 28px;
}

/* ==========================================================================
   Özellikler Bölümü (Dönüşümlü: Beyaz Zemin)
   ========================================================================== */

.ozellikler {
    background-color: var(--bg-card);
    padding: 96px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.bolum-baslik {
    text-align: left;
    margin-bottom: 48px;
}

.bolum-baslik h2 {
    font-size: 32px;
    font-weight: 750;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.bolum-baslik p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 620px;
}

.ozellik-akisi {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Geniş Özellik Satırı (2 sütunlu vitrin) */
.ozellik-genis-satir {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.ozellik-genis-satir.ters {
    grid-template-columns: 1fr 1fr;
}

.ozellik-metin h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.ozellik-metin p {
    font-size: 15.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Görsel / Şema Blokları */
.ozellik-sema-blok {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

/* Barkod Görseli */
.barkod-simulasyon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}

.barkod-cizgiler {
    width: 100%;
    height: 48px;
    background: repeating-linear-gradient(
        90deg,
        #1c1c1e,
        #1c1c1e 3px,
        transparent 3px,
        transparent 6px,
        #1c1c1e 6px,
        #1c1c1e 10px,
        transparent 10px,
        transparent 13px,
        #1c1c1e 13px,
        #1c1c1e 15px,
        transparent 15px,
        transparent 20px
    );
    border-radius: 4px;
    opacity: 0.85;
}

.barkod-kod {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 0.15em;
}

.barkod-rozet {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background-color: #ecfdf5;
    color: #065f46;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 700;
}

/* Geriye Dönük Kayıt Şeması */
.defter-sema {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.defter-satir {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.defter-satir.normal {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.defter-satir.duzeltme {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px dashed #f87171;
}

.defter-satir small {
    color: var(--text-tertiary);
    font-size: 11.5px;
}

.defter-aciklama {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    margin-top: 4px;
}

/* Maliyet ve Kâr Kartı */
.ozellik-tek-kart {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 36px;
    box-shadow: var(--shadow-sm);
}

.ozellik-tek-kart h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.ozellik-tek-kart p {
    font-size: 15.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   Kimin İçin Bölümü (Gri Zemin)
   ========================================================================== */

.hedef-kitle {
    background-color: var(--bg-primary);
    padding: 96px 0;
}

.hedef-kitle-karti {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--text-primary);
    border-radius: var(--radius-lg);
    padding: 36px 36px;
    box-shadow: var(--shadow-card);
    text-align: left;
}

.hedef-kitle-karti h3 {
    font-size: 20px;
    font-weight: 750;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.hedef-kitle-karti p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 800px;
}

/* ==========================================================================
   Kapanış CTA Bölümü (Beyaz Zemin)
   ========================================================================== */

.cagri-bolumu {
    background-color: var(--bg-card);
    padding: 96px 0;
    border-top: 1px solid var(--border);
}

.cagri-karti {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.cagri-metin h2 {
    font-size: clamp(24px, 3.5vw, 32px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.cagri-metin p {
    font-size: 16px;
    color: var(--text-secondary);
}

.cagri-eylemler {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

/* ==========================================================================
   Yasal Sayfalar
   ========================================================================== */

.yasal-sayfa {
    padding: 64px 0 96px 0;
}

.yasal-kart {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 48px 44px;
    box-shadow: var(--shadow-card);
    max-width: 840px;
    margin: 0 auto;
    text-align: left;
}

.yasal-kart h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.yasal-tarih {
    font-size: 13.5px;
    color: var(--text-tertiary);
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.yasal-icerik h2 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 12px 0;
}

.yasal-icerik p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.yasal-icerik ul {
    margin: 12px 0 20px 24px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

.yasal-icerik li {
    margin-bottom: 6px;
}

/* ==========================================================================
   Alt Bilgi (Footer)
   ========================================================================== */

.alt-bilgi {
    margin-top: auto;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 40px 0;
}

.alt-bilgi-icerik {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.alt-bilgi-sol {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
}

.alt-bilgi-sol .telif {
    font-size: 13.5px;
    color: var(--text-secondary);
}

.alt-bilgi-linkler {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.alt-bilgi-linkler a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.15s ease;
}

.alt-bilgi-linkler a:hover {
    color: var(--accent);
}

/* ==========================================================================
   Mobil Uyumluluk (375px ve Tablet)
   ========================================================================== */

@media (max-width: 860px) {
    .hero-izgara {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-sag {
        order: 2;
    }

    .ozellik-genis-satir,
    .ozellik-genis-satir.ters {
        grid-template-columns: 1fr;
        padding: 28px 24px;
        gap: 28px;
    }

    .cagri-karti {
        flex-direction: column;
        align-items: flex-start;
        padding: 36px 28px;
    }

    .cagri-eylemler {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .kapsayici {
        padding: 0 16px;
    }

    .hero {
        padding: 40px 0 56px 0;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero-aciklama {
        font-size: 16.5px;
    }

    .hero-buton-grubu {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 12px;
    }

    .hero-buton-grubu .rozet-baglanti {
        display: flex;
        justify-content: center;
    }

    .hero-buton-grubu .dugme-ikincil {
        width: 100%;
    }

    .cagri-eylemler {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 12px;
    }

    .cagri-eylemler .rozet-baglanti {
        display: flex;
        justify-content: center;
    }

    .cagri-eylemler .dugme-ikincil {
        width: 100%;
    }

    .telefon-cerceve {
        width: 260px;
    }

    .ozellikler,
    .hedef-kitle,
    .cagri-bolumu {
        padding: 64px 0;
    }

    .yasal-kart {
        padding: 28px 18px;
    }

    .alt-bilgi-icerik {
        flex-direction: column;
        align-items: flex-start;
    }
}