/* ==========================================================================
   Dörtrenk Kurs | Galeri (Premium Symmetric Exhibition UI)
   Yol: css/galeri.css
   ========================================================================== */

:root {
    --c-primary: #f39a08;
    --c-primary-dark: #d97f00;
    --c-dark: #0a0f15;
    --c-text: #526070;
    --c-bg: #f8fafc;
    --c-white: #ffffff;

    --radius-md: 24px;
    --radius-lg: 40px;

    --shadow-soft: 0 10px 40px -10px rgba(0,0,0,0.06);
    --shadow-hover: 0 25px 60px -15px rgba(0,0,0,0.15);
    --shadow-float: 0 20px 40px -10px rgba(243,154,8,0.25);

    --bezier: cubic-bezier(0.16, 1, 0.3, 1);
}

.dr-gallery-premium {
    position: relative;
    padding-bottom: 80px;
    background-color: var(--c-bg);
    overflow: hidden;
}

.dr-gallery-premium .container {
    position: relative;
    z-index: 1;
}

/* Arka Plan */
.dr-mesh-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.dr-mesh-blob {
    position: absolute;
    filter: blur(120px);
    border-radius: 50%;
    opacity: 0.3;
}

.blob-gal-1 {
    width: 600px;
    height: 600px;
    background: var(--c-primary);
    top: -100px;
    left: -100px;
    animation: pulse 12s infinite alternate;
}

.blob-gal-2 {
    width: 500px;
    height: 500px;
    background: #e2e8f0;
    bottom: 20%;
    right: -50px;
    animation: pulse 10s infinite alternate-reverse;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1) translate(30px, 30px); }
}

/* HERO */
.dr-gal-hero {
    padding: 100px 0 40px;
    display: flex;
    justify-content: center;
}

.dr-hero-content {
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.dr-badge-glow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.8);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 700;
    color: var(--c-dark);
    margin-bottom: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
}

.dr-badge-dot {
    width: 10px;
    height: 10px;
    background: var(--c-primary);
    border-radius: 50%;
}

.dr-title-massive {
    width: 100%;
    font-size: clamp(40px, 6vw, 76px);
    font-weight: 800;
    color: var(--c-dark);
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin: 0 0 20px 0;
    text-align: center;
}

.dr-text-gradient {
    background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dr-hero-desc {
    width: 100%;
    font-size: 19px;
    color: var(--c-text);
    line-height: 1.75;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

/* FILTER */
.dr-gal-exhibition {
    padding: 40px 0 100px;
}

.dr-filter-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 60px;
}

.dr-filter-bar {
    display: inline-flex;
    background: var(--c-white);
    padding: 8px;
    border-radius: 100px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(0,0,0,0.03);
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
}

.filter-btn {
    background: transparent;
    border: none;
    padding: 12px 24px;
    border-radius: 100px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    color: var(--c-text);
    cursor: pointer;
    transition: all 0.3s var(--bezier);
}

.filter-btn:hover {
    color: var(--c-dark);
}

.filter-btn.active {
    background: var(--c-dark);
    color: var(--c-white);
    font-weight: 700;
    box-shadow: 0 8px 20px rgba(15,23,42,0.15);
}

/* GRID */
.dr-exhibition-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.dr-exhibition-item {
    transition: transform 0.4s var(--bezier), opacity 0.4s ease;
}

.dr-img-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 4/5;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--c-white);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.03);
    transform: translateZ(0);
}

.dr-img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--bezier);
}

.dr-img-frame .placeholder-logo {
    object-fit: contain;
    padding: 60px;
    background: #f1f5f9;
}

.dr-img-frame:hover img {
    transform: scale(1.08);
}

.dr-img-frame:hover {
    box-shadow: var(--shadow-hover);
    border-color: rgba(243,154,8,0.3);
}

/* Overlay */
.dr-glass-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15,23,42,0.9) 0%, rgba(15,23,42,0.1) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 30px;
    opacity: 0;
    transition: opacity 0.4s var(--bezier);
}

.dr-img-frame:hover .dr-glass-overlay {
    opacity: 1;
}

.overlay-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transform: translateY(-20px);
    transition: transform 0.4s var(--bezier);
}

.dr-img-frame:hover .overlay-top {
    transform: translateY(0);
}

.cat-pill {
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--c-white);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid rgba(255,255,255,0.3);
}

.zoom-icon {
    width: 44px;
    height: 44px;
    background: var(--c-primary);
    color: var(--c-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(243,154,8,0.3);
}

.overlay-bottom {
    transform: translateY(20px);
    transition: transform 0.4s var(--bezier);
    text-align: left;
}

.dr-img-frame:hover .overlay-bottom {
    transform: translateY(0);
}

.overlay-bottom h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--c-white);
    margin: 0;
    line-height: 1.3;
}

/* LIGHTBOX */
.dr-pro-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(10, 15, 21, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.dr-pro-lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lb-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.lb-counter {
    color: rgba(255,255,255,0.6);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.lb-close {
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lb-close:hover {
    color: var(--c-primary);
    transform: rotate(90deg);
}

.lb-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: 0.3s;
    z-index: 10;
    padding: 20px;
}

.lb-nav:hover {
    color: var(--c-primary);
    transform: translateY(-50%) scale(1.2);
}

.lb-prev {
    left: 20px;
}

.lb-next {
    right: 20px;
}

.lb-content {
    text-align: center;
    max-width: 70%;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.95);
    transition: transform 0.4s var(--bezier);
}

.dr-pro-lightbox.active .lb-content {
    transform: scale(1);
}

.lb-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    transition: opacity 0.2s ease;
}

.lb-content h3 {
    color: var(--c-white);
    font-size: 20px;
    font-weight: 500;
    margin-top: 30px;
    letter-spacing: 0.02em;
    opacity: 0.85;
}

/* CTA */
.dr-cta {
    padding: 40px 0 100px;
    position: relative;
    z-index: 1;
}

.dr-cta-box {
    background: linear-gradient(135deg, var(--c-primary) 0%, #d97f00 100%);
    border-radius: var(--radius-lg);
    padding: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-float);
    gap: 30px;
}

.dr-cta-text h2 {
    font-size: 36px;
    margin-bottom: 16px;
    color: var(--c-dark);
    letter-spacing: -0.02em;
    text-align: left;
}

.dr-cta-text p {
    font-size: 18px;
    color: rgba(15,23,42,0.82);
    margin: 0;
    max-width: 560px;
    line-height: 1.65;
    text-align: left;
}

.dr-cta-btns {
    display: flex;
    gap: 16px;
}

.dr-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 15px;
    transition: all 0.4s var(--bezier);
    border: none;
    text-decoration: none;
    cursor: pointer;
}

.dr-btn-white {
    background: var(--c-white);
    color: var(--c-dark);
}

.dr-btn-white:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-soft);
}

/* Animasyon */
.reveal-fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s var(--bezier);
}

.reveal-fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-stagger {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--bezier), transform 0.8s var(--bezier);
}

.reveal-stagger.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .dr-exhibition-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .dr-cta-box {
        flex-direction: column;
        text-align: center;
        gap: 40px;
        padding: 50px 40px;
    }

    .dr-cta-text h2,
    .dr-cta-text p {
        text-align: center;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    .dr-title-massive {
        font-size: 44px;
    }

    .dr-filter-bar {
        border-radius: var(--radius-md);
        padding: 16px;
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .filter-btn {
        padding: 10px;
        font-size: 14px;
        border-radius: 12px;
    }

    .dr-exhibition-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .lb-header {
        padding: 20px;
    }

    .lb-nav {
        display: none;
    }

    .lb-content {
        max-width: 95%;
    }

    .lb-content img {
        max-height: 60vh;
    }

    .lb-content h3 {
        font-size: 16px;
        margin-top: 20px;
    }

    .dr-btn {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .sidebar-img,
    .bento-bg.placeholder-logo {
        padding: 50px;
    }
}