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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header similar al de tu sistema */
.header {
    background: #3c4a5c;
    color: white;
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo {
    font-size: 18px;
    font-weight: 600;
}

.header-logo i {
    margin-right: 8px;
    color: #4a90e2;
}

/* Contenedor principal */
.main-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.login-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    padding: 40px;
    width: 100%;
    max-width: 450px;
    border-left: 4px solid #4a90e2;
}

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-title {
    color: #3c4a5c;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-subtitle {
    color: #6c757d;
    font-size: 16px;
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    color: #3c4a5c;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    background: #fafbfc;
    transition: all 0.3s ease;
    outline: none;
}

.form-input:focus {
    border-color: #4a90e2;
    background: white;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.password-input {
    padding-right: 50px;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    font-size: 16px;
    padding: 5px;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #4a90e2;
}

.login-button {
    width: 100%;
    padding: 14px;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 25px;
}

.login-button:hover {
    background: #357abd;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.login-button:active {
    transform: translateY(0);
}

.error-message {
    background: #fff5f5;
    border: 1px solid #fed7d7;
    border-left: 4px solid #e53e3e;
    color: #c53030;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 25px;
    font-size: 14px;
}

.register-link {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #e1e5e9;
}

.register-link a {
    color: #4a90e2;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.register-link a:hover {
    color: #357abd;
    text-decoration: underline;
}

/* Loading state */
.login-button.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.login-button.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 12px 20px;
    }

    .header-logo {
        font-size: 16px;
    }

    .login-card {
        padding: 30px 25px;
        margin: 10px;
    }

    .login-title {
        font-size: 24px;
    }
}

/* Animación de entrada */
.login-card {
    animation: fadeInUp 0.6s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer info */
.footer-info {
    text-align: center;
    padding: 20px;
    color: #6c757d;
    font-size: 14px;
}