body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-align: center;
    background-color: #121212;
    color: #ffffff;
    padding-bottom: 200px;
    margin: 0;
}
h1 {
    font-size: 2.5rem;
    color: #4ade80;
}
#grid-lineas {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    max-width: 800px;
    margin: auto;
}
.linea {
    background-color: #2a2a2a;
    border-radius: 8px;
    padding: 15px;
}
.linea h3 {
    margin: 0 0 15px 0;
    color: #f59e0b;
}
.cupos-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 10px;
}
.cupo {
    padding: 20px 10px;
    border-radius: 6px;
    font-weight: bold;
    transition: all 0.2s;
}
.cupo.disponible {
    background-color: #374151;
    cursor: pointer;
}
.cupo.disponible:hover {
    background-color: #4b5563;
}
.cupo.seleccionado {
    background-color: #3b82f6;
    border: 2px solid white;
    transform: scale(1.05);
}
.cupo.reservado, .cupo.pagado {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    line-height: 1.2;
    padding: 10px 5px;
    cursor: not-allowed;
}
.cupo.reservado {
    background-color: #f97316;
}
.cupo.pagado {
    background-color: #22c55e;
}
.cupo.reservado span, .cupo.pagado span {
    font-size: 0.8em;
    opacity: 0.8;
}
.cupo.reservado strong, .cupo.pagado strong {
    font-size: 1em;
    word-break: break-all;
}
#panel-reserva {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    padding: 20px;
    box-shadow: 0 -4px 12px rgba(0,0,0,0.5);
    transform: translateY(100%);
    transition: transform 0.4s ease-in-out;
}
#panel-reserva.visible {
    transform: translateY(0);
}
input {
    width: 95%;
    max-width: 300px;
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid #555;
    background-color: #333;
    color: #fff;
    font-size: 16px;
}
button {
    padding: 12px 25px;
    border-radius: 8px;
    border: none;
    background-color: #22c55e;
    color: white;
    font-weight: bold;
    cursor: pointer;
}
button:disabled {
    background-color: #555;
}