:root {
    --primary: #e60023; /* Pinterest-like red */
    --hover-primary: #ad081b;
    --background: #ffffff;
    --surface-light: #efefef;
    --surface-hover: #e2e2e2;
    --text-main: #111111;
    --text-muted: #767676;
    --border: #dfdfdf;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Helvetica, "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", メイリオ, Meiryo, "ＭＳ Ｐゴシック", Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
.header-container {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--background);
    box-shadow: 0 1px 4px rgba(0,0,0,0.05); /* very subtle */
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-bar {
    flex-grow: 1;
    position: relative;
    max-width: 800px;
}

.search-bar input {
    width: 100%;
    padding: 12px 20px 12px 40px;
    border-radius: 24px;
    border: none;
    background-color: var(--surface-light);
    font-size: 16px;
    outline: none;
    transition: background-color 0.2s;
}

.search-bar input:hover, .search-bar input:focus {
    background-color: var(--surface-hover);
}

.search-bar .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.header-links {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 10px 16px;
    border-radius: 24px;
    font-weight: 600;
    transition: background-color 0.2s;
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    background-color: var(--hover-primary);
}

@media (max-width: 768px) {
    .header-container {
        gap: 10px;
        padding: 10px;
    }
    .logo-text {
        display: none; /* Hide logo text on mobile */
    }
    .nav-btn {
        display: none; /* Hide 'Browse' text on mobile */
    }
    .search-bar input {
        padding: 10px 10px 10px 32px;
        font-size: 14px;
    }
    .search-bar .search-icon {
        left: 10px;
        width: 16px;
        height: 16px;
    }
    .btn-primary {
        padding: 8px 12px;
        font-size: 12px;
    }
}

/* Category Scroll */
.category-wrapper {
    padding: 12px 20px;
}
.category-scroll {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scrollbar-width: none;
    white-space: nowrap;
    -ms-overflow-style: none; 
}
.category-scroll::-webkit-scrollbar {
    display: none;
}
.category-pill {
    padding: 8px 16px;
    background-color: var(--surface-light);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.category-pill:hover, .category-pill.active {
    background-color: var(--text-main);
    color: white;
}

/* Main Container */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* Masonry Grid */
.masonry-grid {
    column-count: 5;
    column-gap: 20px;
}

@media (max-width: 1400px) { .masonry-grid { column-count: 4; } }
@media (max-width: 1024px) { .masonry-grid { column-count: 3; } }
@media (max-width: 768px) { .masonry-grid { column-count: 2; column-gap: 10px; padding: 10px; } }
@media (max-width: 480px) { .masonry-grid { column-count: 2; } }

.prompt-card {
    break-inside: avoid;
    margin-bottom: 20px;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    cursor: zoom-in;
    background-color: var(--surface-light);
}

@media (max-width: 768px) {
    .prompt-card { margin-bottom: 10px; border-radius: 12px; }
}

.prompt-card img {
    width: 100%;
    display: block;
    border-radius: 16px;
    transition: transform 0.3s;
    object-fit: cover;
}

.prompt-card:hover img {
    /* Slight zoom out effect optionally */
}

/* Hover Overlay */
.card-overlay {
    position: absolute;
    inset: 0;
    border-radius: 16px;
    background: rgba(0,0,0,0.4);
    opacity: 0;
    transition: opacity 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 16px;
}
.prompt-card:hover .card-overlay {
    opacity: 1;
}
@media (max-width: 768px) {
    .card-overlay { display: none; } /* Simpler on mobile */
}

.overlay-btn {
    background: var(--primary);
    color: white;
    align-self: flex-end;
    padding: 8px 16px;
    border-radius: 24px;
    font-weight: 600;
    font-size: 14px;
    border: none;
    cursor: pointer;
}
.overlay-btn:hover {
    background: var(--hover-primary);
}

.card-title {
    margin-top: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    padding: 0 4px;
}

/* Detail Page */
.prompt-detail-container {
    max-width: 1000px;
    margin: 40px auto;
    background: var(--background);
    border-radius: 32px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    display: flex;
    overflow: hidden;
    min-height: 500px;
}
@media (max-width: 768px) {
    .prompt-detail-container {
        flex-direction: column;
        border-radius: 0;
        margin: 0;
        box-shadow: none;
    }
}

.prompt-image-sec {
    flex: 1;
    background: var(--surface-light);
}
.prompt-image-sec img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.prompt-content-sec {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
}
@media (max-width: 768px) {
    .prompt-content-sec {
        padding: 20px;
    }
}
.prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.action-btns {
    display: flex;
    gap: 10px;
}
.btn-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 20px;
}
.btn-icon:hover {
    background: var(--surface-hover);
}

.prompt-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
}
.prompt-desc {
    color: var(--text-main);
    margin-bottom: 25px;
    font-size: 16px;
}

.prompt-code-box {
    background: var(--surface-light);
    padding: 20px;
    border-radius: 16px;
    position: relative;
    margin-bottom: 20px;
}
.prompt-code-box p {
    white-space: pre-wrap;
    font-family: monospace;
    font-size: 14px;
    max-height: 250px;
    overflow-y: auto;
}
.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255,255,255,0.8);
    border: none;
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

/* Modal specific */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.modal-overlay .prompt-detail-container {
    max-height: 90vh;
    margin: 0;
    overflow-y: auto;
    width: 100%;
}
@media (max-width: 768px) {
    .modal-overlay {
        padding: 10px;
    }
    .modal-close {
        top: 10px;
        right: 10px;
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
}
.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-weight: bold;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Ads elements */
.ad-slot {
    margin: 20px auto;
    text-align: center;
    display: block;
    min-height: 90px;
}