/* ==========================================================================
   YUKI TSUNODA #22 - REAL PHOTO COLLAGE STYLESHEET
   Clean, Non-clickable Photo Gallery Grid for Mobile & Desktop
   ========================================================================== */

:root {
    --bg-dark: #080a0e;
    --red-f1: #ff1801;
    --cyan-nitro: #00e5ff;
    --text-main: #ffffff;
    --font-title: 'Outfit', sans-serif;
    --font-mono: 'Space Grotesk', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-title);
    line-height: 1.5;
    min-height: 100vh;
    padding-bottom: 3rem;
}

/* Background Carbon Texture */
.carbon-bg {
    position: fixed;
    inset: 0;
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(255, 24, 1, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 90%, rgba(0, 229, 255, 0.08) 0%, transparent 50%),
        linear-gradient(45deg, rgba(255,255,255,0.015) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.015) 75%),
        linear-gradient(45deg, rgba(255,255,255,0.015) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.015) 75%);
    background-size: 100% 100%, 100% 100%, 14px 14px, 14px 14px;
    background-position: 0 0, 0 0, 0 0, 7px 7px;
    z-index: -1;
    pointer-events: none;
}

/* Header */
.header {
    text-align: center;
    padding: 3rem 1.5rem 2.5rem;
}

.header-container {
    max-width: 800px;
    margin: 0 auto;
}

.jp-title {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 4px;
    color: var(--red-f1);
    font-weight: 700;
    display: block;
    margin-bottom: 0.3rem;
}

.header-title {
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.1;
}

.badge-22 {
    background: var(--red-f1);
    color: #fff;
    padding: 0.15rem 0.6rem;
    border-radius: 8px;
    font-size: clamp(1.8rem, 4vw, 3rem);
    box-shadow: 0 0 25px rgba(255, 24, 1, 0.6);
}

/* Collage Grid Layout */
.collage-wrapper {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.collage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    grid-auto-rows: 250px;
    grid-auto-flow: dense;
    gap: 1.25rem;
}

.collage-item {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    cursor: default;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    user-select: none;
    -webkit-user-select: none;
}

.collage-item.item-large {
    grid-column: span 2;
    grid-row: span 2;
}

.collage-item.item-tall {
    grid-row: span 2;
}

.collage-item.item-wide {
    grid-column: span 2;
}

.collage-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: brightness(0.85);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s ease;
}

.collage-item:hover .collage-img {
    transform: scale(1.05);
    filter: brightness(1);
}

.collage-item:hover {
    border-color: var(--cyan-nitro);
    box-shadow: 0 15px 35px rgba(0, 229, 255, 0.25);
}

/* Overlay & Caption */
.item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(8, 10, 14, 0.92) 0%, rgba(8, 10, 14, 0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.4rem;
    pointer-events: none;
}

.item-overlay h3 {
    font-size: 1.35rem;
    font-weight: 800;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .collage-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 230px;
    }
    
    .collage-item.item-large,
    .collage-item.item-wide,
    .collage-item.item-tall {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .header {
        padding: 2rem 1rem 1.5rem;
    }
}