/* ============================================================
   1. PROJE ANAYASASI & DEĞİŞKENLER
   ============================================================ */
:root {
    --primary-orange: #FF5722;
    --primary-black: #111111;
    --primary-white: #FFFFFF;
    --transition-speed: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================================
   2. ANA SECTION & LAYOUT YAPISI
   ============================================================ */
#galeri {
    width: 100%;
    position: relative;
    padding: 80px 0;
    background-color: var(--primary-white);
    overflow: hidden;
}

.gallery-container-flex {
    display: flex;
    flex-direction: column;
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

/* --- BAŞLIK ALANI --- */
.gallery-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 5%;
}

.gallery-header .pre-title {
    color: var(--primary-orange);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 5px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 15px;
}

.gallery-header h2 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--primary-black);
    text-transform: uppercase;
    line-height: 1.1;
    margin-bottom: 25px;
}

.gallery-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
    border-bottom: 3px solid var(--primary-orange);
    padding-bottom: 20px;
    display: inline-block;
}

/* ============================================================
   3. BRÜTALİST GRİD & HOVER EFEKTLERİ
   ============================================================ */
.gallery-wrapper {
    width: 100%;
    padding: 20px 5%;
    position: relative;
}

.brutalist-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 220px;
    grid-auto-flow: dense;
    gap: 15px;
}

/* Temel Kart Yapısı */
.b-item {
    position: relative;
    overflow: hidden;
    background-color: var(--primary-black);
    cursor: pointer;
    transition: var(--transition-speed);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Resim Efektleri (1.3 Kat Büyüme Buraya Bağlı) */
.b-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(1) sepia(0.2) contrast(1.1);
    transition: var(--transition-speed);
}

/* --- HOVER DURUMU --- */
.b-item:hover {
    z-index: 10;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.b-item:hover img {
    transform: scale(1.3); /* İstediğin 1.3 kat büyüme */
    filter: grayscale(0) sepia(0) contrast(1); /* Renkler canlanır */
}

/* --- CLICK / EXPANDED DURUMU --- */
.b-item.expanded {
    grid-column: span 2;
    grid-row: span 2;
    outline: 5px solid var(--primary-orange);
    z-index: 20;
}

.b-item.expanded img {
    filter: grayscale(0) contrast(1);
}

/* --- ENDÜSTRİYEL OVERLAY (Yazı ve Renk Katmanı) --- */
.b-label {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 87, 34, 0.9) 0%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: 25px;
    opacity: 0;
    transition: 0.4s;
    z-index: 2;
}

.b-item:hover .b-label {
    opacity: 1; /* Hover'da görünür olur */
}

.b-text {
    color: white;
    text-align: left;
}

.b-text h3 {
    font-weight: 900;
    text-transform: uppercase;
    font-size: 20px;
    margin: 0;
    letter-spacing: -1px;
}

.b-text span {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 700;
    display: block;
    margin-bottom: 5px;
}

/* Simetri için her 5. eleman geniş başlar */
.b-item:nth-child(5n) {
    grid-column: span 2;
}

/* ============================================================
   4. NAVİGASYON (OKLAR)
   ============================================================ */
.scroll-nav-wrapper {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 50px;
    padding-bottom: 20px;
}

.book-link-scroll {
    width: 50px;
    height: 50px;
    background-color: var(--primary-orange);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.book-link-scroll:hover {
    background-color: var(--primary-black);
    transform: scale(1.1) translateY(-3px);
}

/* ============================================================
   5. RESPONSIVE AYARLAR
   ============================================================ */
@media (max-width: 1100px) {
    .brutalist-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .brutalist-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .brutalist-grid { grid-template-columns: repeat(1, 1fr); }
    .b-item:nth-child(5n) { grid-column: span 1; }
}