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

body {
    font-family: "Segoe UI", Arial, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a, #1e293b, #334155);
    color: #f8fafc;
    padding: 40px 20px;
}

.container {
    max-width: 1150px;
    margin: auto;
}

/* Encabezado */
.header {
    text-align: center;
    margin-bottom: 35px;
}

.header h1 {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 8px;
}

.header p {
    color: #cbd5e1;
    font-size: 16px;
}

/* Tarjetas */
.card {
    background: rgba(255, 255, 255, 0.09);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 28px;
    margin-bottom: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.card h2 {
    margin-bottom: 22px;
    font-size: 22px;
}

/* Formulario */
form {
    display: grid;
    grid-template-columns: repeat(3, 1fr) auto;
    gap: 15px;
    align-items: center;
}

input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 15px;
    outline: none;
}

input::placeholder {
    color: #cbd5e1;
}

input:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

/* Botón */
button {
    padding: 14px 22px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #38bdf8, #2563eb);
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* Tabla */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

thead {
    background: rgba(56, 189, 248, 0.15);
}

th {
    padding: 16px;
    text-align: left;
    color: #7dd3fc;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
}

tbody tr {
    transition: 0.2s ease;
}

tbody tr:hover {
    background: rgba(255, 255, 255, 0.06);
}

/* Diseño responsive */
@media (max-width: 850px) {
    form {
        grid-template-columns: 1fr;
    }

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

    .card {
        padding: 20px;
    }
}