style.css

:root {
    --primary: #D32F2F; /* Deep Red */
    --primary-dark: #8b0000;
    --accent: #FFD700; /* Gold for stars */
    --bg: #121212;
    --surface: #1E1E1E;
    --text: #ffffff;
    --text-sec: #aaaaaa;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; -webkit-tap-highlight-color: transparent; }
body { background-color: var(--bg); color: var(--text); overflow-x: hidden; }

/* Navbar */
.navbar {
    background: var(--primary-dark);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}
.nav-left { display: flex; align-items: center; gap: 15px; }
.logo { font-weight: bold; font-size: 1.1rem; }
.nav-title { font-size: 0.9rem; color: var(--text-sec); }

/* Sidebar */
.sidebar {
    height: 100%; width: 260px; position: fixed; top: 0; left: -260px;
    background: var(--surface); z-index: 200; transition: 0.3s ease;
    box-shadow: 4px 0 15px rgba(0,0,0,0.7);
}
.sidebar.active { left: 0; }
.sidebar-header { background: var(--primary); padding: 20px; display: flex; justify-content: space-between; align-items: center; }
.menu-item { padding: 15px 20px; border-bottom: 1px solid #333; display: flex; align-items: center; gap: 10px; cursor: pointer; }
.menu-item:active { background: #333; }
.highlight { color: #64B5F6; }
#overlay { position: fixed; top:0; left:0; width:100%; height:100%; background: rgba(0,0,0,0.8); z-index: 150; display: none; }

/* Main Container */
.container { padding: 20px; max-width: 800px; margin: 0 auto; padding-bottom: 80px; }
.section-title { margin-bottom: 15px; border-left: 4px solid var(--primary); padding-left: 10px; }

/* Chapter List */
.chapter-card {
    background: var(--surface);
    margin-bottom: 15px;
    border-radius: 12px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    border: 1px solid #333;
}

.card-left { flex: 1; }
.chap-id { color: var(--primary); font-size: 0.8rem; font-weight: 700; display: block; }
.chap-name { font-size: 1.1rem; margin-top: 4px; font-weight: 500; }


/* Star Icon */
.star-indicator {
    color: var(--accent);
    position: absolute;
    top: 10px;
    right: 40px;
    font-size: 1rem;
    display: none; /* Hidden by default */
}
.starred .star-indicator { display: block; }

/* 3 Dot Menu */
.menu-btn { padding: 10px; color: var(--text-sec); cursor: pointer; }
.dropdown {
    position: absolute; right: 15px; top: 45px; background: #2C2C2C;
    border-radius: 8px; z-index: 10; display: none; box-shadow: 0 5px 15px black;
    min-width: 140px; overflow: hidden;
}
.dropdown.show { display: block; }
.dd-item { padding: 12px; border-bottom: 1px solid #444; font-size: 0.9rem; }
.dd-item:active { background: #444; }

/* Chapter Detail View */
.media-card {
    background: var(--surface);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}
.preview-box {
    height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}
.pdf-preview { background: linear-gradient(45deg, #1e3c72, #2a5298); }
.video-preview { background: linear-gradient(45deg, #8E0E00, #1F1C18); }
.preview-box span { font-size: 3rem; margin-bottom: 10px; }

.media-info { padding: 20px; text-align: center; }
.action-btn {
    width: 100%; padding: 15px; border: none; border-radius: 50px;
    font-size: 1rem; font-weight: bold; color: white; margin-top: 15px;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    cursor: pointer;
}
.blue-btn { background: #1976D2; }
.red-btn { background: #D32F2F; }
.divider { border: 0; border-top: 1px solid #333; margin: 20px 0; }

/* Player View */
.player-container {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: black; z-index: 500; display: flex; flex-direction: column;
}
.player-controls {
    padding: 10px; display: flex; align-items: center; justify-content: space-between;
    background: rgba(20,20,20,0.9);
}
.control-icon { background: none; border: none; color: white; padding: 5px; }
iframe { flex: 1; width: 100%; border: none; }

/* Landscape Mode */
.landscape {
    transform: rotate(90deg);
    transform-origin: center;
    width: 100vh !important;
    height: 100vw !important;
    position: fixed; top: 50%; left: 50%;
    margin-left: -50vh; margin-top: -50vw;
}

/* Utilities */
.hidden { display: none !important; }
.modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8); z-index: 1000; display: flex;
    align-items: center; justify-content: center;
}
.modal-content {
    background: var(--surface); padding: 25px; border-radius: 15px;
    width: 85%; max-width: 400px; text-align: center; border: 1px solid var(--primary);
}
.close-modal-btn {
    margin-top: 20px; background: transparent; border: 1px solid var(--primary);
    color: var(--primary); padding: 8px 20px; border-radius: 20px;
}