/* ============================================
   PH Yazılım - Referanslar Sayfası
   Yıldızlı kozmik hero + flip-X başlık + kart grid
   ============================================ */


/* ============================================
   HERO — Hafif CSS arka plan (Three.js blob kaldırıldı)
   radyal gradyan + statik ızgara + yumuşak glow.
   Sürekli GPU maliyeti yok, three.min.js indirilmiyor.
   ============================================ */
/* PERDE: bant tepeye yapışır, .perde-icerik üzerine kayar (style.css + perde.js) */
.referanslar .anomaly-hero {
    position: sticky;
    top: 0;
    z-index: 0;
    min-height: 60vh;              /* SABİT height kaldırıldı: dar ekranda içerik
                                      60vh'ye sığmayıp taşıyordu — artık gerekirse büyür */
    overflow: hidden;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    justify-content: center;       /* içerik dikeyde ORTALI — alta yaslıyken üstte
                                      orantısız boşluk kalıyordu (25.07.2026 ayarı) */
    padding-top: 100px;            /* navbar boşluğu */
    padding-bottom: 60px;
    perspective: 800px;            /* flip-X için */
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(13, 110, 253, 0.30) 0%, rgba(13, 110, 253, 0) 60%),
        radial-gradient(ellipse at 50% 0%, #0d1b3a 0%, #0b1437 45%, #060a1f 100%);
}

/* Statik ince ızgara — dekoratif, GPU'ya yük bindirmez */
.referanslar .anomaly-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(rgba(147, 197, 253, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(147, 197, 253, 0.06) 1px, transparent 1px);
    background-size: 54px 54px;
    -webkit-mask-image: radial-gradient(ellipse 80% 75% at 50% 22%, #000 30%, transparent 80%);
    mask-image: radial-gradient(ellipse 80% 75% at 50% 22%, #000 30%, transparent 80%);
    pointer-events: none;
}

/* Yumuşak cyan glow — statik */
.referanslar .anomaly-hero::after {
    content: "";
    position: absolute;
    z-index: 0;
    top: -120px;
    left: 50%;
    width: 760px;
    max-width: 120%;
    height: 460px;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(13, 202, 240, 0.16) 0%, rgba(13, 202, 240, 0) 70%);
    pointer-events: none;
}

/* ── İçerik — alt ortada ── */
.referanslar .anomaly-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

/* Breadcrumb */
.referanslar .breadcrumb          { background: none; padding: 0; margin: 0; }
.referanslar .breadcrumb-item a   { color: rgba(255,255,255,0.45); font-weight: 500; text-decoration: none; transition: color 0.2s; font-size: 0.88rem; }
.referanslar .breadcrumb-item a:hover  { color: #fff; }
.referanslar .breadcrumb-item.active   { color: rgba(255,255,255,0.30); font-size: 0.88rem; }
.referanslar .breadcrumb-item + .breadcrumb-item::before { content: '›'; color: rgba(255,255,255,0.25); }

/* Mono tarz tag (Observation Log...) */
.referanslar .anomaly-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(125, 211, 252, 0.85);     /* sky-300 */
    font-family: 'Inter', ui-monospace, monospace;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 18px;
    opacity: 0;
    animation: anomalyFadeIn 0.6s 0.15s ease-out both;
}

.referanslar .anomaly-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #38bdf8;
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.8);
    animation: anomalyPulse 2s ease-in-out infinite;
}

@keyframes anomalyPulse {
    0%, 100% { opacity: 0.5; transform: scale(0.9); }
    50%      { opacity: 1;   transform: scale(1.2); }
}

@keyframes anomalyFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════
   BAŞLIK — Harf harf flip-X 3D
   ════════════════════════════════════════════ */
.referanslar .anomaly-title {
    font-size: clamp(2.6rem, 7vw, 5.2rem);
    font-weight: 900;
    color: #f1f5f9;
    line-height: 1.05;
    letter-spacing: -2px;
    margin: 0 0 18px;
    perspective: 800px;
}

.referanslar .flip-letter {
    display: inline-block;
    transform-origin: 50% 50%;
    transform: rotateX(-90deg) translateY(20px);
    opacity: 0;
    background: linear-gradient(135deg, #e0f2fe 0%, #38bdf8 50%, #0d6efd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: flipInLetter 0.9s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    will-change: transform, opacity;
}

@keyframes flipInLetter {
    0%   { transform: rotateX(-90deg) translateY(20px); opacity: 0; }
    60%  { transform: rotateX(20deg)  translateY(-4px); opacity: 1; }
    100% { transform: rotateX(0)      translateY(0);    opacity: 1; }
}

/* Açıklama */
.referanslar .anomaly-desc {
    font-size: 1.05rem;
    color: rgba(203, 213, 225, 0.75);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.65;
    opacity: 0;
    /* Başlığın bitiminden sonra (≈ 0.2 + 11*0.08 + 0.9 ≈ 2s) */
    animation: anomalyFadeIn 0.8s 2s ease-out both;
}


/* ============================================
   REFERANS GRID
   ============================================ */
.referanslar .ref-section {
    padding: 90px 0 100px;
    background: #f8fafc;
}

.referanslar .section-title {
    font-size: 2rem;
    font-weight: 800;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.referanslar .section-subtitle {
    font-size: 1rem;
    color: #6c757d;
    margin-bottom: 0;
}

.referanslar .text-gradient {
    background: linear-gradient(135deg, #0d6efd, #0dcaf0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* ── Referans Kartı (kapak görseli + favicon logo) ── */
.referanslar .ref-card {
    --ref-renk: #0d6efd;
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    height: 100%;
    text-decoration: none;
    color: inherit;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease, border-color 0.35s ease;
    opacity: 0;
    transform: translateY(20px);
    position: relative;
    overflow: hidden;
}

    .referanslar .ref-card.animate-in {
        animation: refFadeInUp 0.55s ease forwards;
    }

    .referanslar .ref-card:hover {
        transform: translateY(-8px);
        border-color: color-mix(in srgb, var(--ref-renk) 35%, transparent);
        box-shadow: 0 18px 44px rgba(15, 23, 42, 0.14);
    }

@keyframes refFadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Kapak görseli */
.referanslar .ref-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: linear-gradient(135deg, var(--ref-renk), color-mix(in srgb, var(--ref-renk) 55%, #0f172a));
}

/* ── Yerel kapak içeriği (25.07.2026): dış görsel servisleri kaldırıldı ──
   thum.io ücretsiz limitte "paid account" hata görseli basıyordu; picsum alakasız
   rastgele fotoğraftı. Kapak artık degrade zemin + ince ızgara + dev baş harf +
   domain pilinden oluşur — dış istek YOK, her ortamda aynı görünür. */

/* İnce ızgara dokusu */
.referanslar .ref-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 26px 26px;
    pointer-events: none;
}

/* Dev yarı saydam baş harf — kapak dokusu */
.referanslar .ref-harf {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 7.5rem;
    font-weight: 800;
    line-height: 1;
    color: rgba(255, 255, 255, 0.16);
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
    user-select: none;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease;
}

.referanslar .ref-card:hover .ref-harf {
    transform: scale(1.12);
    color: rgba(255, 255, 255, 0.24);
}

/* Domain pili — kapak merkez-alt */
.referanslar .ref-domain {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(6px);
    padding: 6px 14px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    white-space: nowrap;
    max-width: calc(100% - 24px);
    overflow: hidden;
    text-overflow: ellipsis;
}

.referanslar .ref-domain i {
    font-size: 0.8rem;
    opacity: 0.85;
}

/* Kapak üzerinde renk tonu (marka rengi) */
.referanslar .ref-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, color-mix(in srgb, var(--ref-renk) 30%, transparent) 0%, transparent 45%, rgba(15, 23, 42, 0.35) 100%);
    pointer-events: none;
}

/* Kategori rozeti (kapak sol üst) */
.referanslar .ref-category {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    color: #fff;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(6px);
    padding: 5px 12px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.18);
}

/* Ok (kapak sağ üst) */
.referanslar .ref-arrow {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.05rem;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(6px);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.18);
    transition: all 0.3s ease;
}

.referanslar .ref-card:hover .ref-arrow {
    background: var(--ref-renk);
    transform: translate(2px, -2px);
}

/* Body */
.referanslar .ref-body {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px 20px;
}

/* Logo rozeti (favicon) — kapakla çakışacak şekilde yukarı taşar */
.referanslar .ref-logo {
    flex: 0 0 auto;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -46px;
    position: relative;
    z-index: 3;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.18);
    border: 1px solid #eef2f7;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
}

    .referanslar .ref-logo img {
        width: 30px;
        height: 30px;
        object-fit: contain;
    }

.referanslar .ref-card:hover .ref-logo {
    transform: scale(1.06) translateY(-2px);
}

.referanslar .ref-info {
    min-width: 0;
}

.referanslar .ref-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
    line-height: 1.3;
    transition: color 0.25s ease;
}

.referanslar .ref-card:hover .ref-title { color: var(--ref-renk); }

.referanslar .ref-topic {
    font-size: 0.82rem;
    color: #64748b;
    margin: 2px 0 0;
    line-height: 1.35;
}


/* ============================================
   CTA
   ============================================ */
.referanslar .cta-section {
    padding: 90px 0;
    background: #0f172a;
    position: relative;
    overflow: hidden;
}

    .referanslar .cta-section::before {
        content: '';
        position: absolute;
        top: -60%;
        right: -10%;
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }

    .referanslar .cta-section::after {
        content: '';
        position: absolute;
        bottom: -50%;
        left: -10%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(13, 110, 253, 0.10), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }

.referanslar .cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

    .referanslar .cta-content h2 {
        font-size: 2.4rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: -1px;
    }

    .referanslar .cta-content .text-gradient {
        background: linear-gradient(135deg, #0dcaf0, #0d6efd);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .referanslar .cta-content p {
        font-size: 1.05rem;
        color: rgba(255, 255, 255, 0.65);
        max-width: 520px;
        margin: 0 auto 32px;
        line-height: 1.7;
    }

.referanslar .cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.referanslar .btn-cta-primary {
    background: linear-gradient(135deg, #06b6d4, #0d6efd);
    color: #fff;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

    .referanslar .btn-cta-primary:hover {
        color: #fff;
        transform: translateY(-3px);
        box-shadow: 0 10px 32px rgba(6, 182, 212, 0.4);
    }

.referanslar .btn-cta-outline {
    background: transparent;
    color: #fff;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.25);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

    .referanslar .btn-cta-outline:hover {
        color: #fff;
        border-color: rgba(255, 255, 255, 0.8);
        transform: translateY(-3px);
    }


/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 991.98px) {
    .referanslar .anomaly-hero  { min-height: 55vh; height: 55vh; padding-top: 90px; }
    .referanslar .anomaly-title { font-size: clamp(2.2rem, 6vw, 3.6rem); }
}

@media (max-width: 767.98px) {
    .referanslar .anomaly-hero  { min-height: 50vh; height: 50vh; padding-top: 90px; padding-bottom: 40px; }
    .referanslar .anomaly-title { font-size: clamp(2rem, 8vw, 2.8rem); letter-spacing: -0.5px; }
    .referanslar .anomaly-desc  { font-size: 0.92rem; }
    .referanslar .anomaly-tag   { font-size: 0.68rem; letter-spacing: 2px; }

    .referanslar .ref-section,
    .referanslar .cta-section { padding: 50px 0; }

    .referanslar .section-title  { font-size: 1.7rem; }
    .referanslar .cta-content h2 { font-size: 1.7rem; }
    .referanslar .cta-buttons    { flex-direction: column; align-items: center; }
}

@media (max-width: 575.98px) {
    .referanslar .anomaly-hero { min-height: 440px; height: 440px; }
}


/* ============================================
   prefers-reduced-motion (zayıf cihaz / kullanıcı)
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .referanslar .flip-letter,
    .referanslar .ref-card,
    .referanslar .anomaly-dot {
        animation: none !important;
        opacity: 1;
        transform: none;
    }
}


/* ===== KARANLIK TEMA — Referanslar ===== */

/* Grid bölümü zemini (açık #f8fafc → koyu bölüm zemini) */
[data-bs-theme="dark"] .referanslar .ref-section {
    background: var(--darker-bg);
}

/* Bölüm başlığı / alt başlık */
[data-bs-theme="dark"] .referanslar .section-title {
    color: var(--text-color);
}

[data-bs-theme="dark"] .referanslar .section-subtitle {
    color: var(--text-muted);
}

/* Referans kartı (beyaz yüzey → koyu kart) */
[data-bs-theme="dark"] .referanslar .ref-card {
    background: var(--surface);
    border-color: var(--surface-border);
    box-shadow: var(--shadow-soft);
}

[data-bs-theme="dark"] .referanslar .ref-card:hover {
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.45);
}

/* Kart metinleri */
[data-bs-theme="dark"] .referanslar .ref-title {
    color: var(--text-color);
}

[data-bs-theme="dark"] .referanslar .ref-topic {
    color: var(--text-muted);
}

/* Favicon/logo kutucuğu — kontrast için AÇIK bırakılır (logolar renkli/şeffaf) */
[data-bs-theme="dark"] .referanslar .ref-logo {
    background: #f1f5f9;
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

/* ── KAPAK GÖRSELİ (SQL/31, 21.09.2026) ──────────────────────────
   Panelden görsel yüklenmişse kapağın zemini o görseldir; yüklenmemişse
   kart eski haliyle (degrade + dev baş harf) çizilir — markup'ta `else`
   dalı var, burada gizleme kuralı GEREKMEZ.
   ⚠ Görsel DOM'da kapağın İLK çocuğudur: ::before (ızgara dokusu) altında,
   ::after (marka rengi tonu) üstünde kalır. Ton kasıtlı olarak korunur —
   üstteki domain/kategori yazıları okunur kalsın diye. */
.referanslar .ref-cover-resim {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}