* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, sans-serif;
}

body {
    background-color: #121212;
    color: #ffffff;
    height: 100vh;
    overflow: hidden;
}

.view {
    display: none;
    height: 100vh;
}

.view.active {
    display: flex;
}

/* Formulario de Login */
#login-view {
    justify-content: center;
    align-items: center;
    background-color: #0f0f0f;
}

.login-card {
    background: #1e1e1e;
    padding: 2rem;
    border-radius: 8px;
    width: 320px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-card input, .login-card button {
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #333;
    background: #2a2a2a;
    color: #fff;
}

.login-card button {
    background: #007bff;
    border: none;
    cursor: pointer;
    font-weight: bold;
}

.error-msg {
    color: #ff5555;
    font-size: 0.85rem;
}

/* App Principal */
.sidebar {
    width: 220px;
    background-color: #1a1a1a;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-btn, .logout-btn {
    padding: 10px;
    background: transparent;
    color: #aaa;
    border: none;
    text-align: left;
    cursor: pointer;
    border-radius: 4px;
}

.nav-btn.active, .nav-btn:hover {
    background: #333;
    color: #fff;
}

.logout-btn {
    margin-top: auto;
    color: #ff5555;
}

.content-area {
    flex: 1;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
}

.player-container {
    width: 100%;
    max-height: 400px;
    background: #000;
    display: flex;
    justify-content: center;
}

video {
    max-width: 100%;
    max-height: 400px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.card {
    background: #222;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    cursor: pointer;
    font-size: 0.9rem;
}

.card:hover {
    background: #333;
}

.card img {
    width: 100%;
    height: 120px;
    object-fit: contain;
    margin-bottom: 8px;
}