/* =========================================
   ACADEMIC DIRECTORY STYLES (RESPONSIVE)
   ========================================= */

/* --- Hero Section --- */
.hero-centered {
    background-color: var(--deep-blue);
    color: var(--white);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 250px;
    padding-top: 100px;
    padding-bottom: 60px;
    text-align: center;
}

.hero-centered h1 {
    color: var(--white);
    font-family: var(--font-serif);
    margin-bottom: 10px;
    font-size: 2.5rem;
    /* Base size */
}

/* --- Course Grid --- */
.acad-container {
    max-width: 1200px;
    margin: -25px auto 80px;
    /* Slight overlap */
    position: relative;
    z-index: 10;
    padding: 0 20px;
}

.course-grid {
    display: grid;
    /* Responsive Grid: Fits as many 280px cards as possible, then stretches */
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.course-card {
    background: #fff;
    border-radius: 15px;
    padding: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.02);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
}

/* Assessment Image Wrapper */
.assessment-img-wrapper {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background-color: #f0f0f0;
    position: relative;
    border-radius: 15px 15px 0 0;
}

.assessment-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(62, 92, 154, 0.2);
    background-color: #fafbfc;
}

.course-card:hover .assessment-img {
    transform: scale(1.08);
}

/* Color strips for subjects */
.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background-color: var(--primary-blue);
    transition: width 0.3s ease;
    z-index: 2;
}

.course-card:hover::before {
    width: 8px;
}

.course-card.mth::before {
    background-color: #3498db;
}

.course-card.phy::before {
    background-color: #e67e22;
}

.course-card.chm::before {
    background-color: #27ae60;
}

.course-card.chm:hover {
    background-color: rgba(39, 174, 96, 0.08);
}

.course-card.esc::before {
    background-color: #9b59b6;
}

.course-card.esc:hover {
    background-color: rgba(155, 89, 182, 0.08);
}

.course-card.mood::before {
    background-color: #8e44ad;
}

.course-card.mood:hover {
    background-color: rgba(142, 68, 173, 0.08);
}

.course-card.anxiety::before {
    background-color: #2980b9;
}

.course-card.anxiety:hover {
    background-color: rgba(41, 128, 185, 0.08);
}

.course-card.stress::before {
    background-color: #c0392b;
}

.course-card.stress:hover {
    background-color: rgba(192, 57, 43, 0.08);
}

.course-card.sleep::before {
    background-color: #16a085;
}

.course-card.sleep:hover {
    background-color: rgba(22, 160, 133, 0.08);
}

.course-code {
    font-family: var(--font-sans);
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--deep-blue);
    margin-bottom: 5px;
    padding: 20px 25px 0 25px;
}

.course-name {
    font-family: var(--font-sans);
    font-size: 1.0rem;
    color: #555;
    margin-bottom: 20px;
    flex-grow: 1;
    /* Pushes button down */
    line-height: 1.4;
    padding: 0 25px;
}

.btn-access {
    background-color: #f8f9fa;
    color: var(--primary-blue);
    text-align: center;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    margin: 0 25px 25px 25px;
    display: block;
    width: calc(100% - 50px);
    box-sizing: border-box;
    transition: all 0.3s ease;

    border: 1px solid #eee;
}

/* transition: all 0.3s ease;

    text-decoration: none;
    transition: all 0.3s;
    border: 1px solid #eee;
    cursor: pointer;
    width: 100%; /* Full width button on card */
/* }  */

.btn-access:hover {
    background-color: var(--primary-blue);
    color: #fff;
    text-decoration: none;
}

/* Self-assessment category button tints */
.course-card.mood .btn-access {
    color: #8e44ad;
    border-color: rgba(142, 68, 173, 0.25);
}

.course-card.mood .btn-access:hover {
    background-color: #8e44ad;
    color: #fff;
}

.course-card.anxiety .btn-access {
    color: #2980b9;
    border-color: rgba(41, 128, 185, 0.25);
}

.course-card.anxiety .btn-access:hover {
    background-color: #2980b9;
    color: #fff;
}

.course-card.stress .btn-access {
    color: #c0392b;
    border-color: rgba(192, 57, 43, 0.25);
}

.course-card.stress .btn-access:hover {
    background-color: #c0392b;
    color: #fff;
}

.course-card.sleep .btn-access {
    color: #16a085;
    border-color: rgba(22, 160, 133, 0.25);
}

.course-card.sleep .btn-access:hover {
    background-color: #16a085;
    color: #fff;
}

/* --- Modal Styles (Folder Browser) --- */
.acad-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10100;
    justify-content: center;
    align-items: center;
    padding: 20px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.acad-modal.active {
    display: flex;
}

.modal-content {
    background: #fff;
    width: 100%;
    max-width: 900px;
    height: 80vh;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fdfdfd;
    gap: 15px;
}

.modal-header-right {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--deep-blue);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    position: relative;
    top: -2px;
}

.close-btn:hover {
    background-color: #f0f0f0;
    color: #333;
}

.modal-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* --- Sidebar Tabs in Modal --- */
.resource-tabs {
    width: 220px;
    background: #f8f9fa;
    padding: 20px 0;
    border-right: 1px solid #eee;
    overflow-y: auto;
    flex-shrink: 0;
}

.res-tab-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 15px 20px;
    background: transparent;
    border: none;
    color: #666;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border-left: 4px solid transparent;
    transition: all 0.2s;
}

.res-tab-btn:hover {
    background-color: #eee;
}

.res-tab-btn.active {
    background: #fff;
    color: var(--primary-blue);
    border-left-color: var(--primary-blue);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* --- File List Area --- */
.resource-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background-color: #fff;
}

.file-list {
    list-style: none;
    padding: 0;
}

/* Ensure file items look clickable */
.file-item {
    display: flex;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    /* Indicates it's clickable */
    transition: background 0.2s;
    border-radius: 8px;
}

.file-item:hover {
    background-color: #f9f9f9;
}

.file-icon {
    margin-right: 15px;
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.file-name {
    font-size: 1rem;
    color: #333;
    font-weight: 500;
    word-break: break-word;
}

/* --- Viewer Styles --- */
.viewer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    z-index: 3000;
    display: none;
    flex-direction: column;
}

.viewer-overlay.active {
    display: flex;
}

.viewer-header {
    height: 50px;
    background: #222;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.viewer-frame {
    flex: 1;
    width: 100%;
    border: none;
    background: #fff;
}

.no-download-mask {
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    height: calc(100% - 50px);
    background: transparent;
    pointer-events: none;
}

/* =========================================
   CONTRIBUTION CARD STYLES
   ========================================= */
.contribution-card {
    background: linear-gradient(135deg, #E8F4F8 0%, #F0FAFC 100%);
    border: 2px solid #A8D8EA !important;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 15px;
    padding: 40px 25px !important;
}

.contribution-card::before {
    display: none !important;
}

.contribution-card:hover {
    background: linear-gradient(135deg, #D4ECF2 0%, #E0F7FB 100%);
    border-color: #5BA3C3 !important;
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(91, 163, 195, 0.25);
}

.contribution-icon {
    font-size: 3rem;
    color: #3499DB;
    opacity: 0.8;
}

.contribution-text {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contribution-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--deep-blue);
    font-weight: 700;
    margin-bottom: 5px;
}

.contribution-subtitle {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: #5BA3C3;
    font-weight: 500;
}

.btn-contribute {
    background-color: #3499DB;
    color: #fff;
    text-align: center;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    font-size: 0.9rem;
}

.btn-contribute:hover {
    background-color: #2980B9;
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(52, 153, 219, 0.3);
}

/* =========================================
   MEDIA QUERIES (Mobile & Tablet Optimization)
   ========================================= */

/* Tablets and small laptops */
@media (max-width: 992px) {
    .hero-centered {
        min-height: 200px;
        padding-top: 110px;
    }

    .hero-centered h1 {
        font-size: 2rem;
    }
}

/* Mobile Devices */
@media (max-width: 768px) {

    /* 1. Modal Transformation: Stack Layout */
    .acad-modal {
        padding: 10px;
        /* Smaller padding on mobile */
        align-items: flex-end;
        /* Sheet style on mobile (optional) or center */
    }

    .resource-search #modalSearchInput {
        width: 110px !important;
        padding: 8px 10px !important;
        font-size: 0.8rem !important;
    }

    .modal-content {
        height: 90vh;
        /* Taller on mobile */
        max-height: 90vh;
    }

    .modal-body {
        flex-direction: column;
        /* Stack sidebar on top of content */
    }

    .resource-tabs {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid #ddd;
        display: flex;
        /* Horizontal scrolling tabs */
        overflow-x: auto;
        white-space: nowrap;
        padding: 0;
        background-color: #fff;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        z-index: 5;
    }

    /* Scrollbar hiding for cleaner look */
    .resource-tabs::-webkit-scrollbar {
        height: 0px;
        background: transparent;
    }

    .res-tab-btn {
        width: auto;
        padding: 15px 20px;
        border-left: none;
        border-bottom: 3px solid transparent;
    }

    .res-tab-btn.active {
        border-left-color: transparent;
        border-bottom-color: var(--primary-blue);
        background-color: rgba(62, 92, 154, 0.05);
    }

    /* 2. Grid Adjustments */
    .acad-container {
        margin-top: -30px;
        padding: 0 15px;
    }

    .course-grid {
        grid-template-columns: 1fr;
        /* Single column on phones */
        gap: 20px;
    }

    .course-card {
        padding: 20px;
    }

    .course-code {
        font-size: 1.2rem;
    }

    .course-name {
        font-size: 1rem;
    }

    /* 3. Search Bar */
    #courseSearch {
        padding: 12px 20px !important;
        font-size: 0.9rem !important;
    }
}

/* Very Small Screens */
@media (max-width: 480px) {
    .hero-centered h1 {
        font-size: 1.8rem;
    }

    .modal-title {
        font-size: 1.2rem;
    }

    .res-tab-btn {
        font-size: 0.85rem;
        padding: 12px 15px;
    }
}