/* FONT IMPORT */
@import url('https://fonts.googleapis.com/css2?family=Merriweather:wght@400;700;900&family=Montserrat:wght@400;500;600&display=swap');

/* BASIC RESET & THEME */
:root {
    --primary-green: #2e7d32;
    --dark-green: #004d40;
    --background-dark: #121212;
    --text-light: #f2f2f2;
    --text-muted: #a0a0a0;
    --border-color: rgba(255, 255, 255, 0.15);
    --module-bg: #1e1e1e;
}

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-light);
    margin: 0;
    padding-top: 80px;
}

/* GLOBAL UI SHELL */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 1000;
    padding: 10px 20px;
    box-sizing: border-box;
}
.header-content {
    max-width: 95%; 
    margin: 0 auto; 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
}
.logo-link img { height: 60px; vertical-align: middle; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a.nav-button, .main-nav .dropbtn {
    color: var(--text-light); text-decoration: none; padding: 8px 10px; 
    border-radius: 5px; transition: background-color 0.3s; font-size: 0.85rem; white-space: nowrap;
}
.main-nav a.nav-button:hover, .main-nav .dropdown:hover .dropbtn, .main-nav a.nav-button.active {
    background-color: #333;
}

.dropbtn { background-color: inherit; border: none; font-family: inherit; cursor: pointer; }
.dropdown { position: relative; display: inline-block; }
.dropdown-content { display: none; position: absolute; background-color: #333; min-width: 160px; box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2); z-index: 1; border-radius: 5px; }
.dropdown-content a { color: var(--text-light); padding: 12px 16px; text-decoration: none; display: block; font-size: 0.9rem; }
.dropdown-content a:hover {background-color: #444;}
.dropdown:hover .dropdown-content { display: block; }

/* MAIN LAYOUT */
.page-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
}

/* PAGE HEADER */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.page-header h1 {
    font-family: 'Merriweather', serif;
    font-size: 3rem;
    margin: 0;
}
.page-header .subtitle {
    color: var(--text-muted);
}
.action-btn {
    background-color: var(--primary-green);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    border: none;
    cursor: pointer;
}

/* TAB NAVIGATION & AUTOPLAY TOGGLE */
.nav-and-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}
.tab-nav-main {
    display: flex;
}
.tab-nav-main .tab-link {
    padding: 15px 30px;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 1.1rem;
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
}
.tab-nav-main .tab-link.active {
    color: var(--text-light);
    border-bottom-color: var(--primary-green);
}

.autoplay-toggle { display: flex; align-items: center; gap: 10px; }
.switch { position: relative; display: inline-block; width: 50px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 2px; bottom: 2px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary-green); }
input:checked + .slider:before { transform: translateX(26px); }

/* TAB CONTENT */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* GLIMPSES FEED */
.glimpses-feed {
    max-width: 550px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    scroll-snap-type: y mandatory;
    height: calc(100vh - 250px); /* Adjust based on header/footer height */
    overflow-y: scroll;
}
.glimpse-container {
    margin-bottom: 2rem;
    scroll-snap-align: start;
}
.glimpse-post-wrapper {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}
.glimpse-post {
    background-color: #000;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    height: 80vh;
    flex-grow: 1;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.glimpse-post video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.glimpse-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    box-sizing: border-box;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}
.glimpse-info .user-info { display: flex; align-items: center; gap: 10px; margin-bottom: 0.5rem; }
.glimpse-info .user-info img { width: 40px; height: 40px; border-radius: 50%; }
.glimpse-info .user-info strong { font-size: 1rem; }
.follow-btn {
    background-color: var(--text-light);
    color: var(--background-dark);
    border: none;
    padding: 4px 10px;
    font-size: 0.8rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
}
.glimpse-interactions {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}
.glimpse-interactions button {
    background: none; border: none; color: white; font-size: 2rem; cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 5px;
}
.glimpse-interactions button span { font-size: 0.8rem; font-weight: bold; }

.glimpse-comment-section {
    margin-top: 1rem;
}
.comment-form textarea {
    width: 100%;
    box-sizing: border-box;
    background-color: var(--module-bg);
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 10px;
    border-radius: 5px;
}

/* DOCUMENTARIES & LESSONS GRID */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}
.video-card {
    background-color: var(--module-bg);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: var(--text-light);
    display: flex;
    flex-direction: column;
}
.video-thumbnail img {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}
.video-card-info {
    padding: 1rem;
    flex-grow: 1;
}
.video-card-info h3 { margin: 0 0 0.5rem 0; }
.video-card-info p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.video-card-actions {
    display: flex;
    justify-content: space-around;
    border-top: 1px solid var(--border-color);
    padding: 5px 0;
}
.video-card-actions button {
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: bold;
    cursor: pointer;
    padding: 8px;
    flex-grow: 1;
}
.video-card-actions button:hover {
    background-color: rgba(255,255,255,0.1);
}

/* TAXONOMIC SEARCH SECTION */
.taxonomic-search-section {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}
.taxonomic-search-section h2 {
    font-family: 'Merriweather', serif;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}
.taxonomic-search-section input {
    width: 100%;
    max-width: 500px;
    padding: 15px 25px;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    background-color: #333;
    color: #fff;
}