/* ===== RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", sans-serif;
}

/* Animación de entrada suave */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Animación de resplandor para el borde */
@keyframes borderPulse {
    0% { border-color: rgba(255, 0, 0, 0.3); }
    50% { border-color: rgba(255, 0, 0, 0.8); box-shadow: 0 0 20px rgba(255, 0, 0, 0.2); }
    100% { border-color: rgba(255, 0, 0, 0.3); }
}

body {
    /* Fondo negro con degradado radial rojo profundo */
    background: radial-gradient(circle at center, #1a0505, #000000);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    overflow: hidden;
}

/* ===== CONTAINER ===== */
.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
    animation: slideUp 0.6s ease-out forwards;
}

/* ===== CARD ===== */
.auth-card {
    background: rgba(20, 0, 0, 0.7);
    backdrop-filter: blur(22px);
    padding: 35px;
    border-radius: 18px;
    /* Borde animado */
    border: 1px solid rgba(255, 0, 0, 0.3);
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    animation: borderPulse 4s infinite ease-in-out;
}

.auth-title {
    text-align: center;
    font-size: 28px;
    font-weight: 800;
    color: #ff0000;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    text-shadow: 0 0 15px rgba(255, 0, 0, 0.4);
}

.auth-sub {
    text-align: center;
    color: #a1a1a1;
    margin-top: 5px;
    margin-bottom: 25px;
    font-size: 14px;
}

/* ===== FORM FIELDS ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    font-size: 12px;
    color: #ff4d4d;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    margin-top: 6px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    background: #0f0f0f;
    color: white;
    font-size: 15px;
    outline: none;
    transition: all 0.3s ease;
}

/* Estilo para los select (flecha y opciones) */
.form-group select {
    cursor: pointer;
    appearance: none; /* Quita el estilo por defecto */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ff0000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
}

.form-group input:focus,
.form-group select:focus {
    background: #140000;
    border-color: #ff0000;
    box-shadow: 0 0 12px rgba(255, 0, 0, 0.3);
}

/* ===== BUTTON ===== */
.btn-primary {
    width: 100%;
    padding: 14px;
    margin-top: 8px;
    border-radius: 12px;
    /* Degradado rojo intenso */
    background: linear-gradient(90deg, #ff0000, #660000); 
    border: none;
    color: #fff;
    cursor: pointer;
    font-weight: 700;
    text-transform: uppercase;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 0, 0, 0.6);
    filter: brightness(1.2);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ===== LINKS ===== */
.auth-links {
    margin-top: 20px;
    text-align: center;
}

.auth-links a {
    color: #ff4d4d; 
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: 0.25s;
}

.auth-links a:hover {
    color: #ffffff;
    text-shadow: 0 0 8px #ff0000;
}