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

body {
    font-family: Arial, sans-serif;
    background: #f5f6f8;
    color: #222;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}


/* HEADER */

.header {
    background: #111827;
    color: white;
    padding: 18px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 25px;
    font-weight: bold;
}

.logo span {
    color: #ef4444;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 25px;
}


/* HERO */

.hero {
    text-align: center;
    padding: 60px 20px;
}

.hero h1 {
    font-size: 40px;
    margin-bottom: 10px;
}

.hero p {
    color: #666;
    margin-bottom: 25px;
}

#searchInput {
    width: 100%;
    max-width: 600px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}


/* SERIES */

.series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin: 25px 0 60px;
}

.series-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: 0.3s;
}

.series-card:hover {
    transform: translateY(-5px);
}

.series-cover {
    height: 150px;
    background: linear-gradient(135deg, #111827, #ef4444);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
}

.series-info {
    padding: 18px;
}

.series-info h3 {
    margin-bottom: 8px;
}


/* VIDEOS */

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin: 30px 0 60px;
}

.video-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    cursor: pointer;
}

.video-thumbnail {
    width: 100%;
    height: 170px;
    object-fit: cover;
    background: #111;
}

.video-info {
    padding: 15px;
}

.video-info h3 {
    font-size: 17px;
    margin-bottom: 5px;
}


/* PLAYER */

.player-wrapper {
    max-width: 900px;
    margin: 30px auto 70px;
}

.player-wrapper h1 {
    margin-bottom: 20px;
}

#videoPlayer {
    width: 100%;
    max-height: 600px;
    background: black;
    border-radius: 10px;
}

.player-actions {
    margin-top: 20px;
}

.download-button {
    display: inline-block;
    background: #16a34a;
    color: white;
    padding: 12px 20px;
    border-radius: 7px;
    text-decoration: none;
}


/* ADMIN */

.admin-card {
    background: white;
    padding: 25px;
    margin: 25px 0;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.07);
}

.admin-card input,
.admin-card select {
    width: 100%;
    padding: 13px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 6px;
}

button {
    background: #ef4444;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    opacity: 0.9;
}

.back-button {
    margin-top: 30px;
    background: #374151;
}

.help {
    color: #777;
    margin-top: 10px;
    font-size: 14px;
}


/* FOOTER */

footer {
    background: #111827;
    color: white;
    text-align: center;
    padding: 25px;
}


/* HIDDEN */

.hidden {
    display: none;
}


/* MOBILE */

@media(max-width: 600px) {

    .hero h1 {
        font-size: 30px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    nav a {
        margin: 0 8px;
    }

}