/*
File: index_page.css

CSS page for the home page of Physdepot.org, separate from the generic stylesheet "style.css".

Progammer: Neil Ghugare

Revision History:
07/20/2026 Created initial version of this file, separating from HTML.
08/05/2026 Hardware acceleration updates for mobile.

Notes:
*/

/* --- Affiliation Carousel --- */

/* The outer container clips anything that extends past the screen edges. */
.logo-slider {
    overflow: hidden;
    padding: 20px 0;
    background: white;
    position: relative;
    width: 100%;
}

/* Adds a nice fade-out effect on the left and right edges. */
.logo-slider::before,
.logo-slider::after {
    content: "";
    height: 100%;
    position: absolute;
    width: 150px;
    z-index: 2;
    pointer-events: none;
}
.logo-slider::before {
    left: 0;
    top: 0;
    background: linear-gradient(to right, rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%);
}
.logo-slider::after {
    right: 0;
    top: 0;
    background: linear-gradient(to left, rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%);
}

.logo-track-container {
    display: flex;
    width: max-content;
    animation: scrollLogos 25s linear infinite;
    will-change: transform;
}

/* The track holding both blocks of logos arranged in a row. */
.logo-slide-track {
    display: flex;
    align-items: center;
}

/* Keeps the images consistently sized and spaced. */
.logo-slide-track img {
    height: 60px;
    margin: 0 10px; /* Spacing can be adjusted between logos if needed. */
    object-fit: contain;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

/* The magic animation: slides the track left by exactly half its full width. */
@keyframes scrollLogos {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* Pause the scrolling when someone hovers over a logo. */
.logo-slider:hover .logo-track-container {
    animation-play-state: paused;
}

/* --- Featured Section --- */

h2.section-title {
    color: rgb(59, 24, 105);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 500;
    text-align: left;
}

h2.section-title strong {
    color: rgb(85, 35, 150);
}

.featured-card {
    display: flex;
    flex-direction: column; 
    align-items: center;  
    text-decoration: none;  
    color: inherit;         
    
    background: #eaeaea;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.06);
    padding: 2.5rem;
    margin-bottom: 3rem;   
    cursor: pointer;
    
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Smooth lifting effect on hover. */
.featured-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.09);
}

.featured-header-top {
    width: 100%;
    font-size: 1.45rem;
    color: #1a1a1a;
    margin-top: 0;
    margin-bottom: 1.5rem;
    line-height: 1.35;
    font-weight: 700;
}

.featured-image-center {
    width: 100%;
    max-width: 500px;        /* Limits width on large desktop screens. */
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.featured-image-center img {
    width: 100%;
    height: auto;
    max-height: 280px;        /* Prevents images from taking over the screen height. */
    object-fit: contain;     /* Preserves original graphic aspect ratio. */
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.08); /* Gives light graphic assets a soft frame. */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    padding: 6px;
    background-color: #fafafa;
}

.featured-description-full {
    width: 100%;
    font-size: 0.98rem;
    line-height: 1.65;
    color: #444444;
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.featured-meta-bottom {
    width: 100%;
    display: flex;
    justify-content: flex-start; 
}

.contributor-tag {
    display: inline-block;
    background-color: #f0f4f8;
    color: rgb(0, 24, 35);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Mobile Responsiveness. */
@media (max-width: 600px) {
    .featured-card {
        padding: 1.5rem;
    }
    
    .featured-header-top {
        font-size: 1.25rem;
    }

    h2.section-title {
        color: rgb(59, 24, 105);
        font-size: 1.5rem;
        margin-bottom: 2rem;
        font-weight: 500;
        text-align: left;
    }
}

/* --- Social Section --- */

.social-section {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Should stack on mobile */
    gap: 1.5rem;
}

.social-card {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border-radius: 14px;
    padding: 1.8rem;
    text-decoration: none;
    color: #333333;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.social-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.instagram-card:hover {
    border-color: #e1306c;
}

.discord-card:hover {
    border-color: #5865f2; /* Discord Blurple */
}

.discord-card .social-icon {
    color: #5865f2; /* Discord Blurple */
}

.social-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.social-icon {
    font-size: 2.2rem;
}

.social-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: #1a1a1a;
}

.social-description {
    font-size: 0.95rem;
    line-height: 1.55;
    color: #555555;
    margin-top: 0;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.social-action {
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
}

.instragram-card .social-action {
    color: #e1306c;
}

.discord-card .social-action {
    color: #5865f2 /* Discord Blurple */
}

/* --- Contributor Section --- */

.community-section {
    max-width: 900px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: linear-gradient(135deg, #f9f8ff 0%, #f0f4f8 100%); /* Soft gradient. */
    border-radius: 20px;
    border: 1px solid rgba(59, 24, 105, 0.08);
}

.community-header h2 {
    color: rgb(59, 24, 105);
    font-size: 1.8rem;
    margin-top: 0;
    margin-bottom: 0.75rem;
}

.community-lead {
    color: #444;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.contribution-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
    background: rgb(59, 24, 105);
    color: #ffffff;
}

.btn-secondary {
    background: #ffffff;
    color: rgb(59, 24, 105);
    border: 1px solid rgba(59, 24, 105, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.contributors-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.contrib-card {
    background: #ffffff;
    border-radius: 14px;
    padding: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.contrib-card h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: #1a1a1a;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.institution-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
}

.institution-list a {
    color: rgb(59, 24, 105);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.institution-list a:hover {
    text-decoration: underline;
}