body {
    font-family: 'Roboto', 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f4f8;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a237e 0%, #283593 50%, #3949ab 100%);
    color: #333;
}

.container {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    padding: 2.5rem;
    width: 90%;
    max-width: 650px;
    transition: all 0.3s ease;
}

.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2rem;
    text-align: center;
}

.logo {
    margin-bottom: 1rem;
    width: 150px;
    height: 150px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo img {
    max-width: 100%;
    max-height: 100%;
}

h1 {
    text-align: center;
    color: #1a237e;
    margin-bottom: 0.5rem;
    font-size: 1.7rem;
    line-height: 1.3;
    font-weight: 600;
}

h2 {
    text-align: center;
    color: #303f9f;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    font-weight: 500;
}

.form-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-weight: bold;
    color: #555;
}

input {
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
    width: 100%;
    box-sizing: border-box;
}

input:focus {
    border-color: #3f51b5;
    box-shadow: 0 0 0 3px rgba(63, 81, 181, 0.2);
    outline: none;
}

button {
    padding: 14px 28px;
    background-color: #3f51b5;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 100%;
    letter-spacing: 0.5px;
    margin-top: 10px;
}

button:hover {
    background-color: #303f9f;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

button:disabled {
    background-color: #9e9e9e;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.message {
    margin-top: 1.5rem;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    animation: fadeIn 0.5s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message.error {
    background-color: #ffebee;
    color: #d32f2f;
    border-left: 5px solid #f44336;
}

.message.success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left: 5px solid #4caf50;
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Overlay para mensajes y spinner */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.overlay.show {
    opacity: 1;
    visibility: visible;
}

.success-message {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    max-width: 80%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.5s;
}

.success-message h3 {
    color: #2e7d32;
    margin-top: 0;
    font-size: 24px;
}

.success-message p {
    margin-bottom: 0;
    color: #555;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 20px auto;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: #3f51b5;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.footer {
    margin-top: 2rem;
    text-align: center;
    color: #555;
    font-size: 0.8rem;
}

/* Card effect on containers */
.card-effect {
    transition: transform 0.3s, box-shadow 0.3s;
}

.card-effect:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* Progress bar */
.progress-container {
    width: 100%;
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    margin: 15px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #3f51b5, #7986cb);
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
        width: 95%;
    }
    
    h1 {
        font-size: 1.3rem;
    }
    
    h2 {
        font-size: 1.1rem;
    }
    
    .logo {
        width: 120px;
        height: 120px;
    }
}