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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
    transition: transform 0.3s ease;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.error-message {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white !important;
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
    animation: shake 0.5s ease-in-out;
    border: none;
    font-weight: 500;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

form {
    display: flex;
    flex-direction: column;
}

.input-group {
    margin-bottom: 25px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e1e1;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafafa;
    color: #333;
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

input[type="text"]:hover,
input[type="password"]:hover {
    border-color: #bbb;
    background: white;
}

button[type="submit"] {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

button[type="submit"]:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

button[type="submit"]:active {
    transform: translateY(-1px);
}

button[type="submit"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button[type="submit"]:hover::before {
    left: 100%;
}

.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes flotar {
    to {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 25px;
        margin: 10px;
    }

    h2 {
        font-size: 24px;
    }

    input[type="text"],
    input[type="password"] {
        padding: 12px 16px;
        font-size: 14px;
    }

    button[type="submit"] {
        padding: 14px 20px;
        font-size: 14px;
    }
}

/* Efectos adicionales */
.input-icon {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    color: #bbb;
    font-size: 18px;
    pointer-events: none;
    transition: color 0.3s ease;
}

.input-group:focus-within .input-icon {
    color: #667eea;
}

#submitBtn {
  background-color: #25a589;
  color: white;
  border: none;
  padding: 10px 25px;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s;
}

#submitBtn:hover {
  background-color: #00264d;
}